Heat a large dutch oven or soup pot over medium heat. Add the cooking oil and the Italian sausage. Crumble the sausage and cook until it is fully brown.
Next add the diced onion, bell pepper, and garlic to the pot. Sauté the veggies with the sausage for 3-4 minutes until they have softened and are fragrant.
Now add in the tomato paste, Italian seasoning, salt, black pepper, red chili flakes, crushed tomatoes, diced tomatoes, and sugar. Stir everything together until well combined. Then pour in the chicken broth and stir. Place a lid on the pot and bring the pot up to a boil.
While you’re waiting on the pot to start boiling, go ahead and break up your lasagna pasta into small 1-inch pieces.
Once the pot starts boiling add in the broken lasagna and press to submerge them in the broth. Place the lid back on the pot and simmer the soup for roughly 14 minutes or until the lasagna pasta is tender.
Finally stir in the heavy cream and fresh parsley. Turn the heat off. Serve this lasagna soup with a couple spoonfuls of the cheese topping (optional) and some fresh garlic bread. Enjoy!
Notes
The cheese topping is optional, but definitely recommended. Mix together the 3 cheeses listed above with a little salt and pepper and add a couple spoonfuls of it to each serving bowl.
Storing Leftovers: Store any leftover lasagna soup in an airtight container in the refrigerator for 2-3 days.