Name: Vegetarian Lasagna Soup Recipe
Prep time: 10 min
Cook time: 20 min
Total time: 30 min
Cuisine: Italian
Ingredients: 1 tablespoon olive oil; 1 yellow onion, diced; 6 cloves garlic, thinly sliced; 1.5 tablespoons Italian seasoning; 2 tablespoons tomato paste; 1/2 cup basil pesto; 1-2 teaspoons granulated sugar (optional); Kosher salt, to taste; Fresh cracked pepper, to taste; 2 (28 oz.) cans fire roasted crushed tomatoes; 4 cups vegetable broth; 1/2 cup uncooked split red lentils; 8 uncooked lasagna noodles, broken into bite-sized pieces; 2-3 cups chopped fresh baby spinach (optional); 1/2 cup Parmesan cheese; 1/2 cup shredded mozzarella cheese; 1 cup whole milk ricotta cheese; Fresh chopped parsley for garnish

Jump to Recipe· 4.4 from 291 reviews

If you have ever wished for the cozy, hearty flavors of lasagna in a bowl, you are about to fall in love with this Vegetarian Lasagna Soup Recipe. It captures all the essence of a traditional lasagna—rich tomato sauce, fragrant herbs, tender pasta, and three kinds of luscious cheese—but in a comforting soup form that’s ready in just 30 minutes. Perfect for chilly evenings or anytime you crave something both nourishing and soul-satisfying, this soup brings a warm hug to the dinner table with every spoonful.

Ingredients You’ll Need

The image shows several white bowls and glass containers placed on a white marbled surface, each holding different ingredients for a recipe. From the top left going clockwise, the first bowl is filled with small round orange lentils, followed by a bowl with a mix of finely chopped garlic and dried herbs, and next a bowl with thin pale yellow cheese shavings. Below that, there is a bowl of white ricotta cheese next to a smaller bowl filled with shredded pale yellow cheese. Two opened cans containing chunky red tomato sauce are placed side by side. A small glass bowl with golden olive oil is near the center, next to a small glass bowl with bright red tomato paste. A white bowl at the bottom center holds chopped white onions, while a larger white bowl contains wavy edged uncooked lasagna pasta sheets. A large glass measuring cup with dark brown broth sits to the left. All items are neatly arranged creating a colorful and organized layout. photo taken with an iphone --ar 4:5 --v 7

The magic of this Vegetarian Lasagna Soup Recipe lies in its simple, fresh ingredients that come together to create layers of flavor, texture, and color. Each element plays an essential role—from the sweet fire-roasted tomatoes adding smoky depth to the creamy trio of cheeses that make every bite decadent and rich.

Olive oil: A good-quality olive oil lends a fruity, smooth base for sautéing your aromatics.
Yellow onion: Adds a mild sweetness and depth when softened just right.
Garlic cloves: Thinly sliced for a punch of garlicky warmth without overpowering the dish.
Italian seasoning: A fragrant blend of herbs that brings the classic lasagna flavor profile to life.
Tomato paste: Intensifies the tomato flavor while giving the soup body and richness.
Basil pesto: A fresh, herby note that complements the tang of the tomatoes beautifully.
Uncooked split red lentils: This unexpected addition adds protein, thickness, and a lovely texture.
Fire roasted crushed tomatoes: These provide a smoky, robust foundation for the soup’s sauce.
Vegetable broth: The flavorful liquid that brings everything together and keeps the soup hearty but light.
Granulated sugar (optional): Just a pinch to balance the acidity of the tomatoes if needed.
Uncooked lasagna noodles: Broken into bite-sized pieces for ease of eating and authentic pasta presence.
Fresh baby spinach: Adds a vibrant green color and nutritious boost, wilting gently into the soup.
Parmesan cheese: A salty, nutty topping that melts slightly for a cheesy finish.
Shredded mozzarella cheese: Offers melty, gooey indulgence that everyone loves.
Whole milk ricotta cheese: Creamy and mild, perfect dolloped on top to elevate every spoonful.
Fresh chopped parsley: Brings a fresh, herbal brightness as a garnish.
Kosher salt and fresh cracked pepper: Essential seasonings to adjust the flavors perfectly.

How to Make Vegetarian Lasagna Soup Recipe

Step 1: Sauté the Aromatics

Start by warming olive oil in a large pot over medium-high heat. Toss in the diced yellow onion with a pinch of salt and pepper and sauté for around 3 minutes until the onion becomes translucent and fragrant. This step builds the flavor base for your soup, gently coaxing the natural sweetness out of the onion.

Step 2: Add Garlic, Herbs, and Tomato Paste

Reduce the heat to medium and stir in thinly sliced garlic cloves, Italian seasoning, and extra salt and pepper. After about a minute, add the tomato paste and cook it down until it turns a hearty brick red—this caramelizes the tomato flavor, making your soup richer and more complex.

Step 3: Deglaze and Add Liquids

Pour a splash of vegetable broth into the pot to deglaze, scraping up those flavorful browned bits from the bottom. Then add the basil pesto, split red lentils, crushed fire-roasted tomatoes, and the rest of the vegetable broth. If the tomatoes feel too acidic, stir in a teaspoon or two of granulated sugar. Season generously with salt and pepper at this stage to build a full-bodied broth.

Step 4: Simmer and Cook the Pasta

Bring the mixture up to a gentle simmer over medium-high heat, stirring often to ensure the lentils don’t stick and burn on the bottom. Once simmering, stir in the broken lasagna noodles, then reduce the heat to low or medium-low. Allow it all to simmer for 12 to 15 minutes until the pasta is cooked al dente and the lentils have softened, stirring occasionally for even cooking and to prevent sticking.

Step 5: Finish with Spinach and Cheese

Remove the pot from the heat and stir in fresh baby spinach until it wilts delicately into the soup. Taste and adjust the seasoning with salt and pepper if needed. Now, ladle the soup into bowls and top with Parmesan, mozzarella, and a generous dollop of creamy ricotta. Cover the pot to let the cheeses melt slightly, then garnish with fresh parsley before serving.

How to Serve Vegetarian Lasagna Soup Recipe

A white pot filled with thick, dark red tomato sauce that has small bits of ground meat and spices visible throughout. Inside the sauce, wide, wavy-edged, yellow pasta pieces are partially submerged and curled in different directions. The sauce surface looks smooth with some texture from the meat and herbs. The pot is on a white marbled surface, with the warm colors of the sauce contrasting against the clean, bright background. Photo taken with an iphone --ar 4:5 --v 7

Garnishes

Fresh parsley adds a bright, herbal finish to balance the creamy richness. Don’t shy away from sprinkling a little extra Parmesan or a drizzle of olive oil on top to enhance the flavors even more. A few crunchy croutons can also add a delightful texture contrast.

Side Dishes

This soup shines wonderfully alongside a crunchy green salad dressed with lemon vinaigrette or a warm slice of crusty garlic bread perfect for dunking. For a heartier meal, roasted vegetables or a tomato-cucumber salad work beautifully to complement the Mediterranean flavors.

Creative Ways to Present

Serve the soup in rustic bowls or even mini bread bowls for a charming presentation. Swirl the cheese carefully on top and finish with a few basil leaves or microgreens for a restaurant-worthy look that will impress guests as well as family members.

Make Ahead and Storage

Storing Leftovers

This Vegetarian Lasagna Soup Recipe maintains its flavors well when refrigerated in an airtight container for up to four days. The lentils and noodles continue to soften over time, so it’s best enjoyed within this window to avoid mushy pasta.

Freezing

If you want to freeze the soup, it’s best to omit the fresh spinach and cheeses first, adding them fresh when reheating. Freeze in portion-sized containers for up to three months. Thaw overnight in the fridge before reheating gently on the stove.

Reheating

Reheat the soup slowly over medium heat, stirring occasionally. Add a splash of vegetable broth or water to loosen the consistency if it thickened too much. Fresh spinach and cheeses added after reheating will brighten the flavors and textures beautifully.

FAQs

Can I use regular lentils instead of split red lentils?

Regular lentils can be used, but they will take longer to cook and may add a firmer texture to the soup. Split red lentils are preferred here because they break down nicely, giving the soup its characteristic creamy consistency.

Is this recipe vegan-friendly?

The base soup is vegetarian, but not vegan due to the cheese. You can easily substitute the Parmesan, mozzarella, and ricotta with plant-based alternatives to make a vegan version that’s just as delicious.

Can I prepare this soup in a slow cooker?

Yes, you can adapt the recipe for a slow cooker by sautéing the aromatics first, then adding all ingredients except the noodles and spinach. Add noodles and spinach in the last 20 minutes of cooking to prevent overcooking.

What if I don’t have lasagna noodles?

Any wide pasta like pappardelle or broken fettuccine works well as a substitute. Just ensure you break them into bite-sized pieces so they create the same comforting noodle texture in the soup.

How can I make the soup spicier?

Adding a pinch of red pepper flakes with the Italian seasoning or stirring in a splash of hot sauce at the end will bring lively heat to the soup without overpowering its balanced flavors.

Final Thoughts

Whether you’re a longtime vegetarian or just in search of a comforting meal that feels like a warm embrace, this Vegetarian Lasagna Soup Recipe is a go-to for any night of the week. It’s easy to make, packed with wholesome ingredients, and brimming with the rich flavors of lasagna in every spoonful. I encourage you to give it a try and discover how this simple soup can quickly become a favorite in your recipe rotation!