01 -
Figure out if you'll broil (quicker, with caramelized tops and firmer fruit) or bake (longer but gives a softer texture that’s warmed through).
02 -
Turn the oven to 400°F for baking or switch the broiler to high if broiling.
03 -
Trim a tiny piece off the bottom of each grapefruit half to keep them steady. Loosen up the sections by cutting around them, then arrange the halves on a baking tray.
04 -
Dust each grapefruit half with cinnamon and drop about a tablespoon of brown sugar on top.
05 -
Broil for 6-8 minutes until the sugar bubbles and melts. If baking, cook for 15-18 minutes at 400°F.
06 -
Sprinkle a bit of flaky sea salt before serving. Serve chilled or warm, however you like it.