Bacon Flavored Double Cheeseburger Meatloaf

Ingredients

• 1 egg
• 1 large sweet onion, chopped
• 1 1/2 pounds ground beef
• 1/4 cup mayonnaise
• 6 slices cooked, crumbled bacon
• 1 cup firm white bread crumbs
• 1 cup shredded Cheddar cheese
• 2 tablespoons sweet pickle relish
• 2 teaspoons dry mustard powder
• 1/2 teaspoon seasoned salt
• 1/2 teaspoon fresh ground black pepper
• 1/4 cup ketchup