Philly Cheesesteak Meatloaf

Name: Philly Cheesesteak Meatloaf
Cuisine: American
Ingredients: 1 1/2 pounds lean ground beef; 1 large onion, chopped; 1 green bell pepper, chopped small; 1/2 cup of whole milk; 1/2 cup mushrooms chopped (optional) family loves them I hate them; 1 tablespoon olive oil; 1 cup bread crumbs (regular, italian style or panko); 1 large egg; 1/2 tsp salt & 1 tsp pepper; 1 tsp garlic powder; 1 tsp onion powder; 1/2 tsp Adobo seasoning; 3 tablespoons Worcestershire sauce; 8 slices of mozzarella OR provolone cheese (i used mozz) (Thick CUT)