Reduced Vinegar
This adds a delicious flavour to many sauces, vegetables, and soups, and is made by putting vinegar, with a little salt and pepper, in a saucepan and letting it boil rapidly until reduced, the proportions being 2 tablespoons of vinegar, 1 saltspoon of salt, and a pinch of pepper cooked until reduced to 1 teaspoon of liquid. Strain before using.