Savory Mushroom Beef Casserole

Name: Savory Mushroom Beef Casserole
Ingredients: 3 Large eggs; 1 lb. Sliced mushrooms; 2 tsp. Minced garlic; 2 Tbsp. Chopped fresh parsley; 6 oz. Cream cheese (softened); 1 lb. Ground beef; 1 tsp. Seasoning salt; Salt and pepper to taste; 2 Tbsp. Unsalted butter; Parmesan cheese for garnish