Cauliflower Parmesan

Position rack in upper third of oven. Preheat to 450 degrees F. Line a large rimmed baking sheet with foil and coat with cooking spray.

Place cauliflower on a cutting board, stem-side down. Using a large chef's knife and starting from the center of the head, cut four 1-inch "steaks." Place the steaks on the prepared baking sheet; lightly coat them with cooking spray, then sprinkle with 1/4 teaspoon each salt and pepper. Roast until browned and tender, 20 to 25 minutes. Remove from oven; turn broiler to high.

Meanwhile, heat oil in a medium saucepan over medium heat. Add onion; cook, stirring, until starting to brown, about 3 minutes. Add garlic; cook, stirring, until fragrant, about 30 seconds. Add tomatoes, wine, Italian seasoning and the remaining 1/4 teaspoon each salt and pepper. Bring to a simmer, reduce heat and cook, stirring occasionally, until thickened, about 10 minutes. Top each cauliflower steak with about 1/3 cup of the sauce and 1/4 cup cheese. Broil until the cheese has melted and browned in spots, 2 to 3 minutes. Sprinkle with parsley, if desired.