HEAT oven to 400 degrees F. Combine preserves and water in heavy saucepan. Bring mixture to a boil over medium high heat; reduce heat and simmer 5 minutes, stirring constantly. Remove mixture from heat and stir in lemon juice, salt, nutmeg and cinnamon.
ARRANGE sweet potatoes in a baking pan. Using a pastry brush, baste potatoes thoroughly with sauce, using about half the sauce. Bake about 40 minutes, or until tender, basting with remaining sauce about halfway through cooking time.