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Slow Cooker Vegetable Soup

Hearty slow cooker vegetable soup with colorful beans and corn in tomato broth.

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A hearty and nourishing vegetable soup made effortlessly in the slow cooker. Packed with fresh vegetables, beans, and savory herbs, it’s a comforting, set-and-forget meal perfect for busy days.

Ingredients

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  • 2 tablespoons olive oil
  • 1 large yellow onion, diced
  • 3 cloves garlic, minced
  • 3 large carrots, peeled and sliced into half-moons
  • 3 celery stalks, sliced
  • 1 medium zucchini, diced
  • 1 medium yellow squash, diced
  • 1 bell pepper (any color), diced
  • 1 (28-ounce) can diced tomatoes, with juices
  • 6 cups vegetable broth
  • 1 teaspoon dried oregano
  • 1 teaspoon dried thyme
  • 1 bay leaf
  • 1 (15-ounce) can kidney beans, drained and rinsed
  • 1 cup frozen green beans
  • 1 cup frozen corn
  • 1 cup small pasta, like ditalini (optional)
  • Salt and freshly ground black pepper, to taste
  • Fresh parsley, for garnish

Instructions

  1. For best flavor, heat olive oil in a skillet over medium heat. Sauté diced onion until translucent, about 5 minutes. Add minced garlic and cook for 30 seconds until fragrant. Transfer to slow cooker. (This step is optional but recommended.)
  2. To the slow cooker, add carrots, celery, zucchini, yellow squash, bell pepper, canned tomatoes with juices, vegetable broth, oregano, thyme, and bay leaf. Stir to combine.
  3. Cover and cook on LOW for 6 to 8 hours or on HIGH for 3 to 4 hours, until vegetables are tender.
  4. About 30 minutes before serving, stir in kidney beans, frozen green beans, frozen corn, and dry pasta (if using). Cover and cook until pasta is al dente and frozen vegetables are heated through.
  5. Remove bay leaf. Season soup generously with salt and pepper. Ladle into bowls and garnish with fresh parsley.

Notes

For a deeper flavor, sauté the onions and garlic first. Add pasta only in the last 30 minutes to prevent mushiness. If the broth tastes flat at the end, brighten it with a splash of red wine vinegar or lemon juice. Soup thickens upon standing; add a splash of broth when reheating leftovers.

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