Preheat oven to 350 degrees F. Spray a 13" x 9" pan with cooking spray.

In a large skillet oven medium-high heat, add olive oil, then onions and bell peppers. Cook, stirring often, for about 3 minutes. Add sausage and continue to cook and stir for another 3-4 minutes, or until vegetables are soft. Set aside.

In a large bowl, whisk together eggs, milk, salt and pepper until well combined.

Layer thawed shredded potatoes in the bottom of the pan. (*tip - to thaw quickly, spread out on a cookie sheet and place in the oven while it heats and while you prepare the rest of the ingredients). Top with sausage and pepper mixture, then cheese, then eggs. Use a fork or spoon to stir ingredients together slightly to make sure that the eggs are evenly distributed.

Bake in the 350 degree oven for 1 hour. Let cool for 10 minutes before serving.