Strawberry Preserves
["2 pt. strawberries, hulled", "3 c. sugar"]
["Combine strawberries and 1 1/2 cups sugar in a heavy saucepan and bring to a boil; stir constantly.", "Boil, uncovered, for 10 minutes.", "Add remaining sugar and boil 15 minutes, stirring frequently, until the mixture reaches 221\u00b0 on a candy thermometer. Skim foam.", "Cool.", "Cover and allow to stand at room temperature for 24 hours; stir occasionally.", "Spoon into clean jars and refrigerate.", "Yields 3 half pints."]
["strawberries", "sugar"]