Heat a 12 inch cast iron or other oven safe skillet over medium heat. Add about a tablespoon of olive oil and a tablespoon of butter, and just when the butter is melted add the onions and potatoes.
Cook onions and potatoes for about ten minutes, stirring gently every couple of minutes, until they begin to turn a nice golden color.
While the potatoes are cooking, whisk the eggs in a small bowl and set aside.
Add two slices of diced bacon. Stir and cook for a few minutes or until the bacon is cooked.
Add the bell peppers and turkey sausage and continue to cook until peppers are soft.
Pour the eggs evenly over the potato mixture, then top with shredded Sharp Cheddar Cheese.
Bake in a preheated 350 degree oven for about 10-15 minutes, or until eggs are cooked to your liking.