Preheat the oven to 180°C or 356°F, and put in the dripping tray. When it's hot, pour into the dripping tray enough hot water to give about 1 cm or ½ inch depth.
Fry 125 g small pieces of bacon in a pan with 1 tablespoon oil. When they are well cooked, remove the excess fat and add 2 tablespoons vinegar to the frying pan. The vinegar is to bring a small note of acidity, and compensate to some extent for the fat of the bacon.