Combine grape juice and lemon juice in a heavy saucepan. Bring to a boil; simmer 3 to 4 minutes.
Meanwhile, soak gelatin in cold water.
Remove grape juice from heat. Add gelatin and sweetener; mix well to dissolve. Pour into two small, hot jars, cover lightly, and cool.
Cover tightly and store in refrigerator no longer than two weeks.
This recipe yields 1 1/2 cups. Serving size: 1 tablespoon.
Exchanges Per Serving: Up to 2 tablespoons may be considered Free Food.
Nutrition Facts: Carbohydrates 3g; Protein 0g; Fat 0g; Calories 11; Fiber 0g; Sodium 1mg; Cholesterol 0mg.
Note: Low-sodium diets: This recipe is excellent.