Preheat your oven to 350°F & grease 9 x 13 baking pan.In a frying pan heat your olive oil over medium heat & add your sausage. Brown all sides of the sausage then remove them from heat.
Top with the remaining mozzarella cheese and the parmesan cheese.Bake for 40 minutes until the cheese is golden brown. Let it rest for 5 minutes then serve.