Place the sausage in a large skillet or saute pan over medium heat and cook for a few minutes, breaking apart with a wooden spoon until it starts to brown a bit. Once the meat starts to break apart, add the onion, mushroom, zucchini and garlic and stir together. Continue to cook for about 8 more minutes while breaking up meat and stirring regularly until sausage is cooked through and vegetables are softened.

Add the tomato sauce, canned tomatoes, tomato paste, basil, Italian seasoning, salt, Parmesan and tortellini and stir until well combined. Cover the pan with a lid and bring heat up until you can see the sauce bubble. Reduce heat to low and simmer for 8 minutes until tortellini is cooked.

Turn off the burner, remove the lid and sprinkle the Mozzarella over the top of the skillet. Place the lid back on the pan and leave it on the warm burner for about 2 minutes until the cheese is melted. Remove the lid and serve.