01 -
Heat the oven to 425°F (220°C) with a rack in the center position.
02 -
Cut the cauliflower into large, evenly sized florets. Pat them completely dry with a clean towel so they brown instead of steam.
03 -
Toss the florets with olive oil, garlic, Italian seasoning, salt, and pepper until evenly coated. Spread them cut-side down on a large rimmed baking sheet, leaving space between pieces.
04 -
Roast uncovered for 20 to 25 minutes until the bottoms are deeply golden and the edges are charred. Rotate the pan halfway through for even browning.
05 -
Sprinkle Parmesan and mozzarella over the hot cauliflower. Return to the oven for 5 to 7 minutes until the cheese melts and forms crisp, bubbling patches.
06 -
Scatter parsley on top if using. Let the pan rest for 2 minutes, then serve. Scrape any crispy cheese bits from the pan and add them to the dish.