Add the mushrooms, onion, and garlic cloves to a food processor. Process until you get a minced texture
Heat a dutch oven or other large pot over medium high heat and add two tablespoons of olive oil
Add the minced mushroom mixture and cook for 8-10 minutes, stirring often, until liquid evaporates mostly
Add in the pasta sauce, tomatoes (do not drain), vegetable broth, basil, oregano, and tomato paste
Bring the soup to a boil
Once boiling, add the broken up lasagna pieces and cook for 9-13 minutes, or until noodles are al dente
Once the lasagna noodles have finished cooking, add in the mozzarella cheese and stir to combine
Salt to taste, if necessary
Serve the lasagna soup garnished with ricotta cheese dollops and fresh chopped parsley