Preheat oven to 450 F and line two baking sheets with parchment paper.
Combine cauliflower, olive oil, lemon juice, garlic, salt, and pepper well so all the florets are coated and seasoned.
Place on the prepared baking sheets and bake in the oven for about 25 minutes, turning the florets halfway so they are evenly cooked.
Remove from oven and top with grated cheese and additional salt and pepper if needed. Serve warm.
Notes
Cut the cauliflower florets into similar sized pieces so they roast evenly.
Don't overcrowd the roasting sheet. The garlic cauliflower should be placed in a single layer so that the roasted cauliflower florets get those nice crispy and caramelized edges.
Use fresh lemon juice and freshly grated parmesan for the best flavors.