Mint Sauce Concentrate 1 lb sugar 1 qt vinegar washed, finely chopped mint leaves Dissolve sugar in vinegar. Boil 10 minutes. Slowly add washed, finely chopped mint leaves. Keep adding leaves until the consistency of jam. Bottle in sterile jars. (The quantities may be reduced if you don't have a lot of mint leaves: by half or even to one-quarter.) To use: Put a spoonful if concentrate in a dish and add hot water to form sauce.