Hearty Vegetarian Lasagna Soup with Mushrooms & Zucchini (Crockpot)

Vegetarian Lasagna Soup

Looking for a meatless dinner that still brings the cozy comfort of lasagna? This Vegetarian Lasagna Soup is it! Packed with mushrooms, zucchini, rich tomato broth, and melty cheese, this slow cooker version makes it easy to go meat-free — without sacrificing flavor or satisfaction.

Great for Meatless Mondays, meal prep, or any night you’re craving a veggie-packed hug in a bowl.

Prep Time: 15 min
Cook Time: 6 hours
Total Time: 6 hrs 15 min
Servings: 6–8 bowls

Ingredients:

  • 2 tbsp olive oil
  • 1 yellow onion, chopped
  • 3 cloves garlic, minced
  • 1 tsp dried oregano
  • 1 tsp dried basil
  • 1/2 tsp red pepper flakes (optional)
  • 8 oz cremini or white mushrooms, sliced
  • 1 zucchini, diced
  • 1 red bell pepper, chopped
  • 1 can (28 oz) crushed tomatoes
  • 1 can (14.5 oz) diced tomatoes
  • 4 cups vegetable broth
  • 10 oz lasagna noodles, broken into pieces
  • 1 cup ricotta cheese (for topping)
  • 1 cup shredded mozzarella
  • 1/2 cup grated parmesan
  • Salt and pepper to taste

Step-by-Step Instructions:

  1. Sauté the Base Veggies
    In a skillet, heat olive oil and sauté onion, garlic, mushrooms, bell pepper, and zucchini for 4–5 minutes. Season with salt, oregano, basil, and red pepper flakes.
  2. Combine in the Crockpot
    Transfer sautéed veggies to your crockpot. Add crushed tomatoes, diced tomatoes, and broth. Stir to combine.
  3. Slow Cook
    Cover and cook on LOW for 5–6 hours or HIGH for 3–4 hours.
  4. Add the Noodles
    Break lasagna noodles into small pieces and stir them in. Cook on high for 30–40 minutes, or until tender.
  5. Cheesy Finish
    Stir in mozzarella and parmesan. Serve each bowl with a generous dollop of ricotta on top.
  6. Garnish and Serve
    Add fresh basil, extra cheese, or a drizzle of olive oil if desired.

What to Serve With This Soup:

  • Garlic focaccia or baguette slices
  • Mixed greens salad with balsamic vinaigrette
  • Roasted carrots or Brussels sprouts

Pro Tips:

  • Use oven-ready noodles to skip the final cooking step
  • Add spinach during the last 10 minutes for extra greens
  • Store cheese separately when freezing for best results

Nutrition Info (Estimated Per Serving):

Serving SizeCaloriesProteinCarbsFatFiberSugar
1 bowl45018g40g22g6g9g

Disclaimer:
Nutrition facts are estimated and may vary based on ingredients used.

Why This Recipe Works:

This soup is hearty and flavorful thanks to the umami from mushrooms, the richness of tomatoes, and the creaminess of the cheese. It’s meatless, but it’s definitely not missing anything. Crowd-pleasing and freezer-friendly, this is a vegetarian dinner staple

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Vegetarian Lasagna Soup

Hearty Vegetarian Lasagna Soup with Mushrooms & Zucchini (Crockpot)


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  • Author: Lucy
  • Total Time: 6 hrs 15 mins
  • Yield: 68 servings 1x
  • Diet: Vegetarian

Description

Meatless but mighty, this vegetarian lasagna soup is full of veggies, Italian flavor, and cheese — all made easy in the crockpot!


Ingredients

Scale

2 tbsp olive oil

1 onion, chopped

3 garlic cloves, minced

1 tsp oregano

1 tsp basil

1/2 tsp red pepper flakes

8 oz mushrooms, sliced

1 zucchini, diced

1 red bell pepper, chopped

1 can (28 oz) crushed tomatoes

1 can (14.5 oz) diced tomatoes

4 cups vegetable broth

10 oz lasagna noodles, broken

1 cup ricotta cheese

1 cup shredded mozzarella

1/2 cup grated parmesan

Salt and pepper to taste


Instructions

1. Sauté onion, garlic, mushrooms, zucchini, and bell pepper in olive oil.

2. Add herbs and transfer everything to the slow cooker.

3. Stir in tomatoes and broth.

4. Cook on LOW for 5–6 hours or HIGH for 3–4 hours.

5. Add broken noodles, cook 30–40 min on HIGH.

6. Stir in mozzarella and parmesan. Serve with ricotta on top.

Notes

Use oven-ready noodles to skip last step.

Add spinach for extra greens.

Freeze without cheese and add fresh when reheating.

  • Prep Time: 15 mins
  • Cook Time: 6 hours
  • Category: Soup
  • Method: Slow Cooker
  • Cuisine: Vegetarian Italian

Nutrition

  • Serving Size: 1 bowl
  • Calories: 450
  • Fat: 22g
  • Carbohydrates: 40g
  • Protein: 18g

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