Breakfast Casserole with Italian Sausage

Name: Breakfast Casserole with Italian Sausage
Prep time: 20 min
Cook time: 35 min
Total time: 55 min
Cuisine: American
Ingredients: 19.5 oz. uncooked turkey or pork Italian sausage; 2 tsp. olive oil + 2 tsp. olive oil (more or less, depending on your pan); 1 lb. sliced mushrooms (pre-sliced mushrooms make it easy, but rinse them before you slice if you're not using those); 2 cups grated Mozzarella cheese; 1/4 cup sliced green onions, plus more to sprinkle over the top (optional but good); 1 cup cottage cheese, rinsed and drained; 10 eggs, beaten until whites and yolks are well combined; 1 tsp. Spike seasoning (optional but recommended, can also use any other spice blend you like with eggs); 1/4 cup coarsely grated Parmesan cheese; fresh ground black pepper to taste