In a large microwave-safe bowl, combine the water and sauce mix, whisking thoroughly. Microwave for 2 minutes. Stir. Continue microwaving one minute at a time, stirring between each cook, until thickened.
Add protein item of choice, vegetable of choice, starch of choice, and 1 cup cheese.
Bake uncovered for 30 minutes. Sprinkle on remaining 1/2 cup cheese. Continue baking until melted.