From Lynne Wilson
4 slices bacon, crisply cooked and crumbled
2 Tbsp. bacon fat
2 Tbsp. onion, minced
2 Tbsp. cider vinegar
1 Tbsp. packed dark brown sugar
½ tsp. dry mustard
½ tsp. salt
1 medium head Boston lettuce
Cook the bacon. Remove it from the heat and crumble, leaving 2 tablespoons of bacon fat in the frying pan.
Wash, dry, and tear the lettuce into small pieces, and place it in a large bowl. Sprinkle the bacon pieces over the lettuce.
Heat the reserved bacon fat. Add the onion and cook for 30 seconds; add the vinegar, sugar, mustard, and salt, and bring the mixture to a boil. Pour the hot dressing over the lettuce and bacon pieces and mix thoroughly. Serve immediately.