Barbecued Meat Balls

**MEAT BALLS**

2 pounds lean ground beef

1 pound bulk pork sausage

1 small onion -- finely chopped

1 cup milk

1 egg -- lightly beaten

2 cups dry bread crumbs

2 teaspoons salt -- or less

1/2 teaspoon pepper

1/2 teaspoon ground allspice -- or less to taste

**SAUCE**

1 tablespoon vegetable oil

1/4 cup minced onion

1 8 oz can tomato sauce

1 tablespoon fresh lemon juice

1 tablespoon brown sugar

1 1/2 teaspoons sugar

1 teaspoon worcestershire sauce

1/2 teaspoon dry mustard

1/2 teaspoon salt

1/8 teaspoon pepper