01 -
Place the cut cauliflower in a microwave-safe bowl with 1 cup of water. Cover with a damp paper towel and microwave on high for approximately 3 minutes or until the cauliflower is tender but not overcooked.
02 -
Drain the cauliflower and pat dry with paper towels. Set aside.
03 -
Preheat oven to 400°F (200°C).
04 -
In a large skillet over medium-high heat, cook the Italian sausage for about 15 minutes. Drain excess fat and set aside.
05 -
In the same skillet, add olive oil and sauté mushrooms over medium-high heat for 10 minutes to remove excess water. Set aside when done.
06 -
Spray a 13x9 inch casserole dish with non-stick spray. Spread ½ cup of pasta sauce on the bottom of the dish.
07 -
In a large bowl, combine the cauliflower, cooked Italian sausage, mushrooms, and green peppers. Toss together until well mixed.
08 -
Spread half of the mixture in the casserole dish. Top with ½ cup of pasta sauce, followed by half of the pepperoni slices (press them slightly between the toppings), and 6 ounces of shredded mozzarella cheese.
09 -
Spread the remaining mixture on top of the cheese, followed by the remaining pepperoni slices (reserving 10 slices for the topping), the rest of the pasta sauce, and the remaining 6 ounces of mozzarella cheese.
10 -
In a small bowl, mix together the Parmesan cheese and Italian seasoning. Sprinkle the mixture over the top of the casserole, then add the 10 reserved pepperoni slices.
11 -
Place the casserole in the preheated oven and bake for 30 minutes, or until the dish is heated through and the cheese is fully melted.