Remove casing from sausage and cut into bite sized pieces. In a large skillet heat olive oil over medium heat and brown the sausage.
Add mushrooms, dried oregano and dried basil to the pan. Saute the mushrooms for 4-5 minutes until the mushrooms have browned and released some liquid.
Add cauliflower rice, strained tomatoes, salt and pepper to the pan. Stir to combine everything and cook for 5 minutes for the cauliflower rice mixture to be heated through.
Top the cauliflower rice and sausage with mozzarella cheese. Place the skillet in the oven and broil until golden brown and bubbly.