Wilted Lettuce Salad

Fry 6 slices of bacon - leave 1/4 cup drippings in pan. Tear 1 head of lettuce into bite size in bowl - add bacon and onion slices and mix. In drippings stir 1/4 cup vinegar, 1 1/2 tsp. sugar, 1/2 tsp. dry mustard, 1/4 tsp. salt, and a dash of pepper. Heat over medium heat until boiling. Remove from heat and add lettuce until coated with dressing.