Preheat oven to 350 F.

If using pre-boiled noodles then boil according to box instructions, drain and set aside, cook sausage and prepare toppings.

Pour some sauce on the bottom of the pan then lay down 1 layer of lasagna noodles.

Add some more sauce, sprinkle with Italian sausage, place a few dollops of ricotta cheese and a few mushrooms then mozzarella. then top with noodles again and repeat the sauce and toppings again until you are finished with toppings or the pan is full.

For the last layer pour sauce and top with cheese.

Bake for 30 minutes if using pre-boiled noodles or until cheese melts and gets bubbly.

If using oven ready lasagna bake for 45-50 minutes or until noodles can be pierced easily with a fork through the lasagna.