Sloppy Joe Casserole - The BakerMama

Ingredients

• 1.5 pounds lean ground beef
• 1 large white onion, diced
• 1 large green bell pepper, diced
• 2 tablespoons brown sugar
• 1 tablespoon Worcestershire sauce
• 2 teaspoons dry mustard
• 1 teaspoon garlic salt
• 1 (15 ounce) can tomato sauce
• 3/4 cup ketchup
• 1 cup all-purpose flour
• 1.5 teaspoons baking powder
• 1/2 teaspoon salt
• 1 cup milk
• 3 tablespoons melted butter
• 1 large egg
• 3/4 cup shredded cheddar cheese