2 tablespoons butter
4 tablespoons good wine vinegar
Salt, pepper
Break 2 or 3 eggs, according to your appetite, into a bowl, taking care not to break the yolks. Heat half the butter in a 6-inch frying pan, and when it turns golden, slip in the eggs very carefully. Cook, puncturing any air bubbles which form in the egg whites with a fork. Don't worry if the eggs go crisp and golden round the edge. When they are cooked the way you like them, season with salt and freshly ground pepper and slide onto a heated plate. Pour 2 tablespoons of wine vinegar into the pan. Allow to reduce by half and pour over the eggs. Wipe out the pan with a cloth or paper towel and repeat the process with the remaining butter, eggs, and vinegar.