Begin by preheating your oven to a hot 425°F (220°C).
Wash your cauliflower and chop it into bite-sized florets. For extra crispy edges, try slicing some of the larger florets into thinner, flatter pieces.
Spread the cauliflower florets evenly onto a large baking sheet.
Generously sprinkle the salt, garlic powder, onion powder, and parmesan cheese over all the cauliflower.
Drizzle the olive oil over the seasoned cauliflower. Toss everything gently with your hands or a spatula until each floret is nicely coated with oil and seasoning.
Arrange the cauliflower back into a single layer on the baking sheet to ensure they roast rather than steam.
Roast in the preheated oven for 25-30 minutes, making sure to stir them halfway through. Continue roasting until the cauliflower edges are beautifully golden brown and perfectly crispy. Keep an eye on them towards the end to prevent over-browning.
Serve this healthy and delicious side dish warm and enjoy!