Philly Cheese Steak Grilled Cheese Casserole Recipe - Recipes by Clare

Ingredients

• 9 oz thinly sliced roast beef
• 1 cup yellow onion, diced
• 1 cup green bell pepper, diced
• 0.87 oz brown gravy mix packet
• 1/2 cup water
• 12 slices white or whole wheat bread
• 1/2 cup margarine or butter, softened
• 4 cups shredded mozzarella cheese