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Instructions
Preheat oven to 425 degrees F (220 degrees C).
Toss cauliflower, olive oil, garlic, salt, pepper, and red pepper flakes together in a bowl until evenly coated; spread onto a baking sheet.
Bake in the preheated oven for 15 minutes. Stir cauliflower mixture and continue baking until tender, 10 to 15 more minutes.
Grease a separate baking sheet. Spread pizza dough onto prepared baking sheet.
Bake pizza crust for 5 minutes. Top crust with cauliflower mixture, mozzarella cheese, Parmesan cheese, prosciutto slices, and red pepper flakes. Bake until crust is lightly browned and cheeses are melted, 8 to 10 more minutes.