Spread half the oil over the top of each half of the grapefruit and then spread the half the honey over each half as well.
Place on a parchment lined cookie sheet or inside a baking dish and broil in the oven for about 5-8 minutes (time will vary by oven, so keep an eye on it).
Allow to cool slightly and serve.
Notes
Please note that the nutrition data given here is a ballpark figure. Exact data is not possible.