Grain Free Cauliflower Pizza Casserole!

I came across a pin of a healthy "Pizza Casserole" on Pinterest,  but could never find an actual recipe for it. (Isn't that the most annoying thing ever? Why pin it if you're not going to tell us how to make it??) Ok, rant over... It looked like it wasn't that difficult, so I threw this together for supper tonight, and was very pleased with the simplicity of it. The best part is that my boys are eating their veggies, without even realizing it!
--C

Ingredients:
4 cups cooked cauliflower, cut into bite size pieces.
1 cup freshly shredded mozzarella cheese
1 cup of your favorite marinara or pizza sauce
Toppings of choice. I used Boars Head Pepperoni

Preheat oven to 350 degrees.
In a bowl mix the cooked cauliflower, marinara and 1/2 cup of the shredded cheese.
Pour into a 2.8 liter (3 quart) casserole dish.
Top with remaining cheese and any additional toppings.
Bake uncovered for approximately 20-25 minutes, until cheese is melted and bubbly.