Cut onions in half crosswise, peel and remove centers leaving 2 or 3 layers of onion. Set aside.
Finely chop enough onion centers to make 1 cup.
Combine chopped onion, ground beef, egg, salt, 1/4 cup bbq sauce and bacon.
Mix well and make 6 large meatballs.
Fit meat mixture into 6 onion halves, mounding it up so that the second half of onion fits over it.
Place stuffed onions in a shallow baking pan.
Bake in a 350° oven for 45 to 60 minutes. Baste with remaining bbq sauce during the last 25 minutes of cooking time.
Onions may be cooked on grill. Wrap in foil and cook over hot coals for 30 minutes. Carefully open foil packets and baste onions with bbq sauce. Grill for another 25 minutes or until onions are tender and meat is done. Makes 6 servings.
*You can also bake the halves and not put them together. Top them with a slice of cheddar at the end if desired.