Keto Pizza Casserole (Crustless Pizza) is a low carb pizza night alternative with common ingredients. Great for meal prep and the entire family. No Cauliflower.
Heat a large skillet to medium-high heat. Brown the sausage meat, then set aside.
In the same pan that you browned the sausage meat, add the olive oil, vegetables, salt, and pepper. Saute the vegetables until translucent & tender.
Layer the casserole in a 9x13 baking pan. I made two layers with 1/2 sausage meat, 1 cup tomato sauce, 1/2 the vegetables, 1/2 the cheese, and 1/2 the pepperoni.
Bake in the oven until the top is browned and the cheese is fully melted (~15-20 minutes).