Egg White Breakfast Casserole

Preheat the oven to 350 degrees F (175 degrees C). Spray a casserole dish with nonstick cooking spray.

Whisk egg whites yogurt salt and pepper together in a bowl. Pour into the prepared dish.

Bake in the preheated oven until starting to set about 10 minutes.

Meanwhile saute mushrooms and onion in a pan until softened 5 to 10 minutes. Spread mushroom mixture sausage crumbles and tomato over the parbaked egg layer. Cover with Cheddar cheese.

Continue baking until eggs are set and cheese is melted 10 to 15 minutes.