1 onion
1 tbsp. oil
1/2 c. barbecue sauce
1 egg
1/3 c. dry bread crumbs
Salt and pepper
1-1/2 lbs. ground beef

Heat oven to 350 degrees. Chop the onion. Heat the oil in a frying pan over medium heat. Add the onion and cook until softened, about 5 minutes. Remove the pan from the heat. Combine 1/4 cup of the barbecue sauce, 1/4 cup of the barbecue sauce, 1/4 cup water and the egg in a large bowl. Stir in bread crumbs, 1 teaspoon salt and 1/4 teaspoon pepper. Crumble in meat and add onion. Mix until well combined. On baking pan, shape meat mixture into a loaf. Bake 1 hour. Spread remaining 1/4 cup sauce over meatloaf and continue baking 30 minutes longer. Let stand 10 minutes before slicing.
 

Source: http://www.nancys-kitchen.com