Cauliflower Pizza Casserole

Bahan-bahan (6 porsi)

• 1 large head of cauliflower, (trimmed and cut into florets)
• 2 cups tomato basil marinara sauce ((I like to use Classico brand))
• 1 cup shredded part-skim mozzarella cheese
• 2 tablespoons freshly grated Parmesan cheese
• salt, (to taste)