Barbecued Meatloaf

Ingredients

• 1 # ground beef
• 1 cup regular oats, uncooked
• 1 med onion, finely chopped
• 1 egg, beaten
• 1 1/2 tsp salt
• 1/2 tsp pepper
• 1 (8 o.z.) can tomato sauce
• 1/2 cup water
• 2 tbls vinegar