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By François Lemoine

Published: Feb 17, 2026

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Vegetarian Spring Pistou Soup

Spring is a season that invites bright flavors and fresh ingredients into our kitchens. This Vegetarian Spring Pistou Soup combines the clean taste of seasonal vegetables with a vibrant basil sauce that delivers a meal that feels both nourishing and comforting. Whether you’re cooking for a family gathered around the table or looking for a light dinner option, this soup is sure to delight.

Why You’ll Love This Soup

Fresh, Seasonal Ingredients

Every element of this soup shines with the bright, earthy tones of leeks, celery, spinach, and basil that are harvested at the peak of flavor. These fresh vegetables bring sharp, crisp sweetness and subtle peppery notes that harmonize beautifully. Together, they create a vibrant palette that celebrates nature’s rhythm and encourages mindful eating.

Balanced Nutrition

Each bite delivers a nutrient punch: leeks offer vitamin K for bone support; spinach packs iron, magnesium, and folate for energy; beans add plant‑based protein and fiber; basil supplies antioxidants that protect cells. Olive oil brings healthy fats that reduce inflammation. Together, they form a balanced, climate‑friendly dish that fuels vitality with every spoonful.

Discover a similar comfort dish with our Chunky Spring Vegetable Soup with Peas, a hearty variation that pairs well with this soup when you’re pressed for time.

Recipe

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Vegetarian Spring Pistou Soup

Vegetarian Spring Pistou Soup


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  • Author: François Lemoine
  • Total Time: 30 min
  • Yield: 6 servings 1x

Description

A light, flavorful vegetable soup crowned with bright pistou, perfect for spring.


Ingredients

Scale
  • 3 tablespoons extra-virgin olive oil (45 mL)
  • 2 large leeks, sliced, white and light green parts only
  • 2 stalks celery (about 100 g)
  • 4 large garlic cloves, sliced
  • 2 russet potatoes (450 g)
  • 1 teaspoon fresh thyme leaves (approximately 1 g)
  • 1 tablespoon herbs de Provence (1 g)
  • ½ teaspoon salt (2 g)
  • ½ teaspoon ground black pepper (0.5 g)
  • ½ cup vegetable broth (120 mL)
  • 5 cups vegetable broth (1.2 L)
  • 2 tablespoons lemon juice (30 mL) optional
  • 2 cans cannellini beans, drained (400 g)
  • 2 cups spinach (60 g)
  • 1–2 cloves garlic (5 g)
  • 2 cups fresh basil leaves (60 g)
  • â…“ cup extra-virgin olive oil (80 mL)
  • ½ lemon (30 mL juice) optional

Instructions

  1. Heat a large pot over medium heat and add olive oil.
  2. Sauté leeks, celery, and garlic until fragrant and vegetables soften.
  3. Add vegetable broth, cannellini beans, spinach, and lemon juice; simmer gently.
  4. Mash or blend portions to thicken, then stir in optional lemon juice.
  5. Serve hot topped with pistou and optional lemon wedge.

Notes

  • Use fresh veggies for best flavor.
  • Serve warm with a dollop of pistou.
  • Prep Time: 15 min
  • Cook Time: 30 min
  • Category: Main Course
  • Method: Baked
  • Cuisine: American

Nutrition

  • Calories: 393 calories
  • Sugar: 5 grams sugar
  • Fat: 20 grams fat
  • Carbohydrates: 41 grams carbohydrates
  • Fiber: 8 grams fiber
  • Protein: 12 grams protein

Ingredients and Substitutions

Main Ingredients

  • 3 tablespoons extra-virgin olive oil (45 mL)
  • 2 large leeks, sliced, white and light green parts only
  • 2 stalks celery (about 100 g)
  • 4 large garlic cloves, sliced
  • 2 russet potatoes (450 g)
  • 1 teaspoon fresh thyme leaves (approximately 1 g)
  • 1 tablespoon herbs de Provence (1 g)
  • ½ teaspoon salt (2 g)
  • ½ teaspoon ground black pepper (0.5 g)
  • ½ cup vegetable broth (120 mL)
  • 5 cups vegetable broth (1.2 L)
  • 2 tablespoons lemon juice (30 mL) optional
  • 2 cans cannellini beans, drained (400 g)
  • 2 cups spinach (60 g)
  • 1–2 cloves garlic (5 g)
  • 2 cups fresh basil leaves (60 g)
  • â…“ cup extra-virgin olive oil (80 mL)
  • ½ lemon (30 mL juice) optional

Substitution Ideas

  • Replace potatoes with diced sweet potatoes for a sweeter bite.
  • Use chickpeas in place of cannellini beans if you prefer a different bean texture.
  • Swap the lemon juice with a splash of apple cider vinegar for a slightly sweet acidity.

How to Make Vegetarian Spring Pistou Soup

Step 1: Sauté the Base

Heat a large, heavy-bottomed pot over medium heat. Once the pot is warm, add 3 tablespoons of olive oil. Stir in the leeks, celery, and 4 cloves of garlic. Cook for 15 minutes, stirring occasionally, until the leeks and celery turn translucent and the potato tender. Add a tablespoon of water if the pot feels dry.

Step 2: Deglaze and Simmer

Increase the heat to medium‑high and pour ½ cup of vegetable broth. Let the liquid simmer, stirring to lift browned bits from the bottom. Reduce the broth for a few minutes, then bring it to a gentle simmer.

Step 3: Add Broth, Beans, and Spinach

  • Pour the remaining 5 cups of vegetable broth into the pot.
  • Add the drained cannellini beans and the 2 cups of spinach.
  • Bring the mixture to a gentle simmer and adjust the heat to maintain a steady, gentle boil.

Step 4: Mash or Blend for Thickness

Use a potato masher or the back of a large spoon to crush some potatoes and beans for a natural thickening. If you prefer a smoother texture, run the soup through a hand blender for a minute. Continue simmering for another five minutes.

Step 5: Finish the Soup

Turn off the heat. Stir in the optional lemon juice to brighten the flavors. Taste the soup and adjust the seasoning with salt or pepper. Serve with a generous dollop of pistou on top. Garnish with a squeeze of half a lemon if desired.

Preparing the Pistou

In a clean mortar, combine 2–3 cloves of garlic, a pinch of salt, and the basil leaves. Use a pestle to mash until the mixture forms a thick, green paste. Gradually drizzle in ⅓ cup of olive oil, stirring constantly, until a sauce‑like consistency emerges. Adjust the seasoning and add a squeeze of lemon juice if desired.

Pro Tips for Success

Keep the Vegetables Even

Uniformly diced potatoes and sliced leeks cook at the same rate, eliminating uneven textures. Cut potatoes into small cubes if you’re in a hurry to reduce cooking time.

Control the Consistency

For a chunkier soup, mash only half the beans and leave the rest whole. Blend the entire pot after step 4 for a smoother finish. Either method works well.

Enhance the Flavor Layer by Layer

After deglazing, add the herbs de Provence and thyme to release aromatic oils. This small step amplifies the soup’s depth without adding extra cooking time.

Flavor Variations

Feel free to experiment with other herbs and vegetables. Add a handful of chopped carrots or parsnips to the sauté for sweet earthiness. Sprinkle roasted red pepper shards during the simmer for a peppery kick.

Check out our Classic Spring Vegetable Soup for a similar, yet distinct, take on this flavor profile.

Serving Suggestions

Pairing Ideas

Serve with a light side of crusty bread, or pair it with a green salad dressed in lemon vinaigrette. For a heartier meal, accompany with grilled cheese made from whole‑grain bread and fresh mozzarella.

Garnish Tips

A drizzle of extra‑virgin olive oil, a few basil leaves, or a sprinkle of grated Parmesan can elevate the presentation. A dash of freshly cracked pepper adds a final touch of spice.

Our 30‑Minute Spring Veggie and Lemon Soup offers a quick alternative if you’re pressed for time while still enjoying the bright flavor profile.

Storage and Freezing Instructions

Cool the soup completely before transferring it to airtight containers. Refrigerate for up to 4 days or freeze for up to 3 months. Reheat gently on the stovetop or microwave, stirring occasionally, until warm.

Nutrition Facts per Serving

CaloriesFatCarbsProteinFiberSugarSodium
393 calories20 grams41 grams12 grams8 grams5 grams 

FAQs About Vegetarian Spring Pistou Soup

Can I use frozen spinach instead of fresh?

Yes. Thaw the spinach, drain excess water, and add it along with the beans. The flavor remains delicious.

What if I want more protein?

Adding a scoop of cooked lentils or chickpeas will boost protein content while keeping the soup hearty.

How spicy can I make this soup?

Introduce diced jalapeños or a pinch of cayenne pepper during the sauté stage for a subtle heat.

Is pistou the only way to finish the soup?

No. A swirl of pesto, a splash of yogurt, or a spoonful of tahini also complement the soup beautifully.

Seasonal Harvest

Spring’s bounty shines in the bright, earthy tones of leeks, celery, spinach, and basil that are harvested at the peak of flavor. These fresh vegetables bring sharp, crisp sweetness and subtle peppery notes that harmonize beautifully. Together, they create a vibrant palette celebrating nature’s rhythm and encouraging mindful eating. Enjoy this bowl as a nourishing start to every day.

Health Benefits

Each bite delivers a nutrient punch: leeks offer vitamin K for bone support; spinach packs iron, magnesium, and folate for energy; beans add plant‑based protein and fiber; basil supplies antioxidants that protect cells. Olive oil brings healthy fats that reduce inflammation. Together, they form a balanced, climate‑friendly dish that fuels vitality with every spoonful for a healthier tomorrow daily.

Environmental Impact

Plant‑based meals cut greenhouse emissions and reduce water use compared to meat dishes. Choosing local spring produce further slashes transportation energy needs. By swapping animal proteins for beans and vegetables, you lower the carbon footprint while boosting fiber intake. Every serving of this soup supports sustainable farming practices that benefit our planet and future generations alike for greener future.

Beverage Pairing Ideas

Pair this aromatic soup with a light, non‑alcoholic drink that amplifies its herbal tones. A sparkling water with a squeeze of lemon gives a refreshing kick. For warmth, a cup of herbal tea—ginger or chamomile—provides soothing heat. These pairings enhance the bowl’s bright flavors without overpowering them in any way ensuring harmony between soup and drink for balance today.

Wrap Up Takeaways

Key takeaways: use fresh, seasonal vegetables to maximize flavor. Add beans for protein and fiber, finishing with a bright pistou made from basil and olive oil. Serve with a light side or a refreshing drink. Keep portions moderate to stay satisfied while avoiding excess. Remember a plant‑based soup can be comforting, heart‑healthy, and climate‑smart for every season today too.

Final Note

Remember to taste as you cook; this practice ensures every spoonful meets your desired balance of flavor, texture, and satisfaction everyday, making cooking enjoyable, mindful, and a source of joy.

Final Thoughts

This Vegetarian Spring Pistou Soup is a perfect showcase of how fresh, plant‑based ingredients can create a satisfying and wholesome meal. The combination of lightly sautéed vegetables, a comforting broth, and a vibrant basil sauce offers both nutritional balance and a burst of flavor.

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