World'S Best Onion Sandwich - cooking recipe

Ingredients

1 c. vinegar
1 tsp. mustard
1 tsp. salt
1 tsp. A.1. sauce
1 tsp. sugar
sweet onions (preferably Vidalia)

Preparation

Mix the first five ingredients and marinate sliced onions for 3 to 4 hours.
Increase the amount of marinade used as you increase the amount of onions.
After marinating, butter bread on both sides.
Make sandwich out of sliced onions.
Toast on grill. Sliced tomato is good on the sandwich.