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Slow Cooker French Vegetable Soup with Pesto

French Vegetable Soup with Pesto

The soup is loaded with vegetables, you won't even miss the meat! 
Course Main Course
Cuisine French
Prep Time 30 minutes
Cook Time 7 hours
Total Time 7 hours 30 minutes
Servings 6
Calories 630kcal


  • 2 1/2 quarts water or chicken broth
  • 1 onion chopped
  • 2 leeks white parts only, sliced
  • 28 oz can whole tomatoes undrained and crushed
  • 4 carrots cut in 1 inch thick half-moons
  • 1 acorn squash peeled, seeded, and cubed
  • 2 red potatoes peeled and cubed
  • 1 stalk fresh thyme, basil, and marjoram
  • 1/2 cup fresh Italian parsley
  • 30 oz canned white beans drained and rinsed
  • 2 stalks celery sliced
  • 1/2 cup celery leaves choppe
  • 1/4 pound green beans trimmed and cut into 2-inch lengths
  • 1/2 pound zucchini sliced 1/2 inch thick
  • 1/3 head savoy cabbage cored and shredded
  • salt and fresh ground black pepper

Basil Pesto

  • 4 cloves garlic peeled
  • 2 cups fresh basil leaves
  • 3/4 cup grated Parmesan cheese
  • 1/4 cup olive oil
  • 2 tablespoons creme fraiche

Skillet Croutons


  • Place the water, onion, leeks, tomatoes and their juice, carrots, acorn squash, and potatoes in the slow cooker. Tie the fresh herbs and parsley together with kitchen twine to make a bouquet garni. Add the bouquet garni and beans to the cooker. Cover and cook on low for about 6 hours.
  • While it's cooking, make the pesto. Add the garlic to a food processor and chop until fine. Add the basil and Parmesan cheese. While the motor is running, slowly add the olive oil and then the creme fraiche. Process until smooth and then store in the fridge until ready.
  • When the vegetables are tender, add the celery, celery leaves, green beans, zucchini, and cabbage to the slow cooker. Cover and cook for an additional hour.
  • Make the croutons by heating the oil in a large skillet over medium-high heat. Swirl the oil around to make sure it covers the bottom of the pan. Chop the bread into bite size pieces and add to skillet. Toast tossing the cubes, until well browned. Remove and let rest on a paper towel.
  • Remove the bouquet garni from the soup and season with salt and pepper. Serve with pesto and croutons on top.


Calories: 630kcal | Carbohydrates: 82g | Protein: 23g | Fat: 25g | Saturated Fat: 8g | Cholesterol: 11mg | Sodium: 559mg | Potassium: 2115mg | Fiber: 16g | Sugar: 18g | Vitamin A: 9090IU | Vitamin C: 61.3mg | Calcium: 419mg | Iron: 8.8mg