Gather and prep all ingredients. Turn on the oven to a broil to preheat. Pour half the olive oil onto a cast iron skillet and turn on the stovetop to a medium heat.

Wash mushrooms, dry well with a paper towel, and cut the mushrooms into slices.

On the stovetop, cook the sausages in the cast iron skillet on medium to high heat until they are brown and fully cooked. Once they are fully cooked, remove the sausages from the skillet and put on a cutting board.

Add the rest of the olive oil to the skillet then add the mushrooms and cook the mushrooms until they are golden brown.

While the mushrooms are cooking, with a diagonal cut, chop up the pork sausage on a cutting board.

Once the mushrooms are fully cooked, add the chopped pork sausage to the skillet and sprinkle with mozzarella cheese. Put it in the oven on broil until the cheese starts to melt. Watch the oven carefully, the cheese melts quick!

Remove from the oven and garnish with green onions.