Sweet & Sour Meat Balls 1 Onion chopped fine 1 Egg 1/2 Teaspoon Salt & Pepper 1 Lb Hamburger Make meatballs small in a frying pan. Sauce: 3/4 Cup Brown Sugar 1/3 Cup Vinegar 1/2 Cup Water 1/4 Cup Ketchup 1/2 Teaspoon Salt & Pepper 1 Teaspoon Dry Mustard 2 Tablespoons Worcestershire Sauce. Mix Together Put in casserole dish & pour sauce on top. Bake for 40 minutes @ 350 degrees.