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  • Lasagna soup with red lentils in a black bowl with lasagna noodles, Parmesan and basil on a wooden board
  • Lasagna soup from above in 2 bowls on a wooden board, with baby spinach, salt and golden spoons
  • Close up of the lasagna soup with lasagna noodles, grated Parmesan, basil and red lentils
  • Lasagna soup from the front at an angle, with a piece of Parmesan on the grater behind
  • Black bowl of vegetarian lasagna soup with tomato pieces and spinach from close above
  • Ingredients for lasagna soup: red lentils, lasagna sheets, carrots, onion, tomatoes and spinach

30 SEPTEMBER 2026

Lasagna Soup with Red Lentils and Spinach

By Verena Frei

This post is also available in: deutsch

Jump to recipe
Prep
15 min
Cook
30 min
Total
45 min
Servings
4 servings
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Hello lovelies,

what do you do on a grey fall evening when everyone wants lasagna but nobody wants to wait an hour for the oven? Here we make lasagna soup. It tastes of tomato sauce, oregano and Parmesan, just like a lasagna, but it is on the table in 45 minutes and needs no ground meat at all, because red lentils do the work.

Lasagna soup from above in 2 bowls on a wooden board, with baby spinach, salt and golden spoons

Red lentils are a regular guest in my kitchen anyway, they fall apart as they cook and make any soup creamy. If you like them fruity, try my creamy vegan lentil soup with orange, for me it is the perfect winter soup.

Why the noodles cook separately

I break the lasagna sheets into pieces and cook them in a second pot. That keeps them al dente and the soup does not get too thick, not even when you reheat leftovers the next day. In the bowl the wavy pieces of pasta look like little lasagna layers.

Close up of the lasagna soup with lasagna noodles, grated Parmesan, basil and red lentils

If you do have time for a proper lasagna at the weekend, my autumn lasagne with pumpkin and spinach is the big sister of this soup. The soup is the Tuesday night version, for when things need to be quick.

And if you want to taste lasagna the Swiss way, my Swiss alpine lasagne with apple has potatoes, apple and caramelized onions between its layers. Here we alternate between both of them all through the fall.

Lasagna soup from the front at an angle, with a piece of Parmesan on the grater behindBlack bowl of vegetarian lasagna soup with tomato pieces and spinach from close aboveIngredients for lasagna soup: red lentils, lasagna sheets, carrots, onion, tomatoes and spinach

The balsamic goes in right at the end, together with the spinach. The splash of acidity lifts the tomatoes and rounds the soup off, that is my little trick for every tomato soup.

And if there are green or brown lentils left in the cupboard, my favorite is mujadara with lentils and crispy onions. I would love to hear how the lasagna soup turned out for you.

Yours, Verena

TIPS

Verena's notes

Tip from my kitchen: the soup tastes almost better on the second day, so I like to cook a double batch and freeze half without the noodles. If you like, add a spoonful of ricotta or mozzarella to the hot bowl, then it tastes even more like lasagna. Traditional Parmesan is made with animal rennet, so for a strictly vegetarian kitchen use a hard cheese made with microbial rennet. And when the kids eat with us, I sometimes leave out the cumin to keep the soup milder.

Lasagna soup with red lentils in a black bowl with lasagna noodles, Parmesan and basil on a wooden board

Lasagna Soup with Red Lentils and Spinach

Thick tomato and lentil soup with carrots and spinach, served with lasagna noodles, Parmesan and basil, ready in 45 minutes.

  • Course:Soup
  • Prep:15 min
  • Cook:30 min
  • Servings:4 servings
Vegetarian

EQUIPMENT

  • large pot
  • second pot for the noodles
  • cutting board
  • knife
  • sieve
  • wooden spoon

INGREDIENTS

For the soup:

To serve:

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INSTRUCTIONS

Sauté the vegetables

  1. Peel and finely chop the onion and garlic. Trim the carrots and cut them into small pieces.
  2. Heat the olive oil in a large pot over medium heat and soften the onion and garlic for 3 to 4 minutes.
  3. Add the carrots and sauté for another 2 to 3 minutes.

Simmer the soup

  1. Rinse the red lentils in a sieve and drain them.
  2. Add the lentils, chopped tomatoes, tomato paste and vegetable broth to the pot. Stir in the oregano, thyme, cumin, salt and pepper.
  3. Bring to a boil and simmer the soup over low heat for about 25 minutes until the lentils are soft and start to fall apart. Stir now and then.

Cook the lasagna noodles

  1. Meanwhile break the lasagna sheets into small pieces and cook them in salted water in a second pot according to the package until tender. Drain.

Add the spinach and serve

  1. Stir the balsamic vinegar and baby spinach into the soup and wait until the spinach has wilted. Season to taste.
  2. Divide the noodles between bowls, ladle the soup over them and serve with Parmesan and fresh basil.

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Calories
490 kcal
Protein
22 g
GOOD TO KNOW

Frequently asked questions

  • In the soup they would soak up a lot of liquid and go soft, especially when you reheat leftovers. Cooked separately and added only in the bowl, they stay al dente and the soup keeps its texture.

  • Yes, the soup without noodles keeps 3 days in the fridge and freezes for 3 months. Cook the noodles fresh, it only takes 10 minutes. Add a splash of broth when reheating, because the lentils thicken as they stand.

  • Yes. The soup itself is vegan, only the Parmesan is not. Use egg-free lasagna noodles and top with a vegan hard cheese or toasted nutritional yeast with a little salt.

  • You can, but it changes the soup. Red lentils fall apart and make it creamy, brown and green lentils keep their shape and need 30 to 40 minutes depending on the variety. Plan on a little more broth.

  • Regular dried lasagna sheets broken into pieces of 4 to 5 cm (1 1/2 to 2 inches). No-boil sheets work too, but they need only 5 to 6 minutes in boiling salted water.

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