Preheat the oven to 400 degrees.
Mix in a large bowl combine cauliflower,heavy cream,all purpose flour, parmesan cheese, smoked mozzarella,red chili flakes,walnuts, salt and pepper.Mix well.
Transfer mixture into a baking dish.
Mix bread crumbs and 1/4 cup smoked mozzarella in a small bowl.
Sprinkle over cauliflower mixture.
Dot with butter all over and bake uncovered until golden brown about 15 mins until cauliflower is tender.
Let it cool slightly.Enjoy!