Brown the sausage in a large skillet over medium-high heat.

Drain excess fat if desired.

Add the chopped yellow onions and sliced fresh mushrooms to the skillet.

Cook until the onions are translucent and the mushrooms are tender.

Remove the sausage, onion, and mushroom mixture from the skillet and set aside in a separate bowl.

Add the vegetable oil to the same skillet and heat over medium-high heat.

Add the fresh hash browns to the skillet.

Cook the hash browns until golden brown on one side.

Add the whisked eggs to the skillet with the hash browns.

Add the sausage and the mushroom mixture back into the skillet.

Scramble all the ingredients together until the eggs are cooked to the desired consistency.

Top with the shredded Cheddar cheese.

Cover the skillet with a lid and cook until the cheese is melted.

Serve hot.