Barbecued Meatballs
["1 egg", "1/3 c. milk", "1 c. bread crumbs", "1/2 c. chopped onion", "1 1/4 tsp. salt", "1/2 tsp. Worcestershire sauce", "1/8 tsp. black pepper", "1 1/2 lb. ground beef", "6 Tbsp. flour", "2 tsp. paprika", "1 1/2 c. catsup", "1 1/2 c. water", "3 Tbsp. vinegar", "2 Tbsp. sugar", "1 tsp. celery seed", "2 Tbsp. Worcestershire sauce", "1/2 c. chopped onion"]
["Preheat oven to 350\u00b0."]
["egg", "milk", "bread crumbs", "onion", "salt", "Worcestershire sauce", "black pepper", "ground beef", "flour", "paprika", "catsup", "water", "vinegar", "sugar", "celery", "Worcestershire sauce", "onion"]