Heat oven to 400F. Spray 8inch square baking dish with nonstick cooking spray. In medium bowl, beat flour and milk with wire whisk until well blended. Add butter, salt and egg whites, beat well. Pour into spray-coated dish.
Bake at 400F for 25 to 30 minutes or until puffed and golden brown. Meanwhile, in a small saucepan combine all topping ingredients, heat over low heat until jelly is melted and mixture is hot stirring frequently.
Immediately after removing popover from oven cut into fourths and serve with hot topping.
