01 -
Put the cauliflower in a microwaveable bowl with a cup of water. Cover with a moist paper towel and microwave for around 3 minutes until it's tender but firm.
02 -
Pour out the water, then pat the cauliflower dry using paper towels. Leave it aside for later.
03 -
Set your oven to 400°F (200°C) to preheat.
04 -
Heat up a big skillet on medium-high and cook the sausage for roughly 15 minutes. If there’s grease, drain it, then set the sausage aside.
05 -
Using the same skillet, add olive oil and cook the mushrooms on medium-high for about 10 minutes to get rid of extra moisture. Set aside when done.
06 -
Coat a 13x9 inch baking dish lightly with nonstick spray. Add ½ cup of marinara to the bottom.
07 -
In a big mixing bowl, toss together the cauliflower, cooked mushrooms, browned sausage, and diced peppers until it's all evenly combined.
08 -
Take half the mix and spread it in the baking dish. Add ½ cup of marinara, half the pepperoni slices (press them gently into the mixture), and 6 ounces of mozzarella over it.
09 -
Layer the rest of the mix over the top. Add the leftover marinara, then sprinkle the final 6 ounces of mozzarella. Save 10 pepperoni slices for the topping.
10 -
Stir the Parmesan with Italian seasoning in a small bowl. Sprinkle this across the top and place the reserved pepperoni slices evenly on the dish.
11 -
Slide the dish into the hot oven and bake for 30 minutes, or until everything's hot and the cheese is bubbly.