Keto Baked Ham, Swiss Cheese, and Mushroom Casserole

Name: Keto Baked Ham, Swiss Cheese, and Mushroom Casserole
Yield: 6
Cuisine: American
Ingredients: 1 Tbsp butter; 2 oz mushrooms, sliced; 6 large eggs; ½ cup heavy cream; 2 oz cream cheese, softened; 1 cup ham, diced; ½ cup Swiss cheese, diced; ¼ tsp sea salt; ¼ tsp black pepper