How To make Pennsylvania Sweet Potatoes In Tangy Sauce

6 ea Large sweet potatoes
1 c Sugar
1/2 c Lightly packed brown sugar
1/4 t Ground ginger
2 T Cornstarch
1 c Unsweetened pineapple juice
1 t Lemon juice
1 T Low fat margarine
Place sweet potatoes in a large kettle and add water to cover. Cook over medium heat until barely tender; drain. Peel and cut potatoes into fourths. Arrange in a medium size casserole. Preheat oven to 350F. While potatoes are cooking, combine sugars, ginger and
cornstarch in a small saucepan. Add pineapple juice and lemon juice. Stir over medium heat until sugars are dissolved and mixture starts to bubble; stir in margarine. Pour sauce over potatoes. Bake uncovered 50 to 60 min or until sauce is thickened. Cal: 149, Fat: trace.