01 -
Set your oven to 400°F (200°C, or 180°C if using a fan setting). Use parchment paper to line a large baking tray.
02 -
Slice your cauliflowers into 6 thick, steady pieces, roughly ¾ inch wide. Any floret bits that fall off? Just rearrange them back onto the tray.
03 -
Spread the Parmesan cheese over the parchment-covered baking tray, then place your cauliflower slices on top in one layer.
04 -
Combine the oil, salt, pepper, and onion powder in a little bowl. Coat each cauliflower slice with this tasty mix using a brush.
05 -
Bake the cauliflower for 20 minutes, until you can poke a fork through easily and it feels tender.
06 -
Drop the grated Gruyere (or cheddar) on each cauliflower slice. Put them back in the oven for another 10-15 minutes, until the cheese gets all bubbly and golden.
07 -
Scatter the fresh chopped chives on top and dig in while it’s warm and gooey.