01 -
Set oven temp to 400°F (200°C) and get a big baking sheet ready with parchment.
02 -
Chop the cauliflower into 6 pieces, each about 3/4 inch thick.
03 -
Spread parmesan across the parchment, then put cauliflower cuts on top.
04 -
Stir together oil, onion powder, salt, and pepper. Coat cauliflower with this mix.
05 -
Cook in the oven for around 20 minutes, until soft enough to pierce easily.
06 -
Add shredded gruyere on top and cook another 10-15 minutes till melted and golden.
07 -
Garnish with fresh chives before serving.