*If you are in a cold climate: with a kitchen brush, spread a baking tray with the grapeseed or coconut oil. Place the grapefruit slices on tray and brush them again with oil. Add the coconut sugar (to taste), cinnamon and ginger to the center of the slice like if it was the center of a flower. Put it in the oven to broil for 10 to 15 minutes at 375°F. Don't let the grapefruit slices dry out.