Spray 13×9 glass baking dish with cooking spray 10 inch skillet cook sausage over medium for 8 to minutes stir till no more pink
Spread frozen potatoes in baking dish sprinkle sausage green chiles and 1 ½ cup of cheese
Beat egg milk salt in medium bowl with fork or whisk until blended pour potatoes mixture sprinkle the rest of the cheese cover refrigerate at least 8 hours
Heat oven 350 bake 50 to 60 minutes or until knife inserted near center comes out clean let stand for 10 minutes before serving. Serve with salsa