Breakfast Casserole with Turkey Sausage, Mushrooms, and Tomatoes - PCOS-Friendly Recipe

Coat a medium nonstick skillet with cooking spray and heat over medium heat. Add sausage and brown, breaking up with a wooden spoon as meat cooks, about 10 minutes. Using a slotted spoon, transfer sausage to a plate. Set aside.

Add mushrooms to skillet and cook over medium-high heat until they begin to brown, about 4 minutes, stirring occasionally. Season with salt and pepper. Add onion, reduce heat to medium-low, and cook, stirring occasionally, until onion is soft and mushrooms are well browned, about 4 more minutes. Set mixture aside.

Preheat oven to 350 degrees F. In a medium bowl, toss bread, cheese, tomatoes, reserved sausage, and reserved mushrooms and onions. Coat a 9- by 13-inch casserole dish with cooking spray and spread mixture in an even layer in dish. In a medium bowl, beat together eggs and egg whites. Whisk in milk and pour over bread mixture. Cover dish with aluminum foil and let casserole sit for 10 minutes. Press foil down gently to ensure top layer of bread cubes soaks up liquid.

Bake casserole for 35 minutes. Remove foil and bake 15 minutes more. Let rest for 15 minutes before serving.