01 -
Place cauliflower florets into a microwave-safe bowl with 240 millilitres of water. Cover with a damp paper towel and microwave on high for approximately 3 minutes or until just tender. Avoid overcooking.
02 -
Drain the cauliflower thoroughly and gently pat dry with paper towels. Set aside.
03 -
Preheat oven to 200°C.
04 -
In a large skillet over medium-high heat, cook Italian sausage for about 15 minutes, crumbling as it cooks. Drain excess fat. Set aside.
05 -
Using the same skillet, add olive oil and sauté sliced mushrooms over medium-high heat for 10 minutes to remove excess moisture. Set aside.
06 -
Lightly grease a 33 x 23 centimetre casserole dish with non-stick spray. Spread 120 millilitres of marinara sauce evenly over the bottom.
07 -
In a large bowl, combine cooked cauliflower, browned sausage, sautéed mushrooms, and green pepper. Mix until evenly distributed.
08 -
Spread half of the filling mixture into the prepared dish. Top with 120 millilitres marinara sauce, followed by half the pepperoni and 170 grams mozzarella, pressing pepperoni slightly into the layer.
09 -
Add the remaining filling mixture to the dish. Top with most of the remaining pepperoni, reserving 10 slices for garnish, the remaining 120 millilitres sauce, and 170 grams mozzarella cheese.
10 -
In a small bowl, combine Parmesan cheese and Italian seasoning. Sprinkle the mixture evenly over the casserole and arrange the remaining pepperoni slices on top.
11 -
Place casserole in the preheated oven and bake for 30 minutes or until thoroughly heated and cheese has melted and begun to brown.