On a large baking sheet, toss the cauliflower florets, sliced onion, thyme, and olive oil until everything is evenly coated. Season generously with salt and pepper.
Roast for 25 to 35 minutes, tossing once or twice, until the cauliflower is golden brown and caramelized. About 10 minutes before the cauliflower is done, sprinkle the Parmesan over the top, toss, and return to the oven to finish roasting.
Remove from the oven and squeeze fresh lemon juice over the top before serving
Perfect Parmesan Roasted Cauliflower · Dinner Match Lab | Dinner Match Lab