Heat an oven proof skillet (like my 12” cast iron frying pan) over medium high heat and pre-heat broiler on high.
Add sausage to pan and break apart with a wooden spoon or spatula while it cooks. (No oil is necessary here if you have a nice fatty sausage. If you are using a very lean sausage, add a tablespoon of oil).
Add onion, pepper and mushroom and sauté, stirring occasionally, until vegetables are cooked.
Add beaten eggs. Let cook on stove top 1-2 minutes, stirring a couple of times.
Place skillet in oven on middle rack and broil until eggs are completely cooked, puffed up and starting to brown on top (about 7-10 minutes, varies oven to oven so watch carefully) .
