Heat oven to 400. Lightly spray a baking pan w/ cooking spray. Combine preserves and water in a heavy pot. Bring to a boil over med-high heat. Reduce heat and simmer 5 mins, stirring often.
Remove pot from heat. Stir in lemon juice, salt, nutmeg and cinnamon.
Arrange sweet potatoes in baking pan. Baste potatoes thoroughly w/ sauce, using 1/2 of the sauce. Bake potatoes 40 min or until potatoes are tender, basting w/ remaining sauce 1/2 way through cooking time.