Tangy Baked Apples

Cut apples in half; brush with 1 teaspoon lemon juice. Place in an ungreased 11-in. x 7-in. x 2-in. baking dish. Combine the brown sugar, ketchup, butter, horseradish and remaining lemon juice. Top each apple half with 2 tablespoons ketchup mixture. Pour water around apples. Bake, uncovered, at 325 degrees F for 30 minutes or until apples are tender. Serve warm. ');