2 tbsp. chopped onion
2 lb. ground beef
1 bottle ketchup
1 tbsp. vinegar
1 tbsp. prepared mustard
1 tsp. salt
1/4 tsp. pepper
1/4 tsp. paprika
4 tbsp. sugar
1/2 c. water

Brown onion and ground beef together. Drain off any grease. Mix other ingredients together and then add to meat mixture. Simmer about 20 to 30 minutes. Serve on warm buns.