- 1 large grapefruit, cut in half
- 1/4 cup old-fashioned oats
- 1 tablespoon brown sugar
- 1/4 teaspoon ground cinnamon
- Dash of salt
- 2 teaspoons butter
- Preheat the oven's broiler and set the oven rack about 6 inches from the heat source.
- Remove all visible seeds from the grapefruit and loosen sections from membrane with a sharp knife. Place grapefruit halves cut side up in a baking dish.
- Stir the oats, brown sugar, cinnamon, and salt together in a small bowl; add the butter and mash with a fork to incorporate oat mixture into the butter. Spread about half of the butter mixture over the top of each grapefruit half.
- Cook under the broiler until the topping is golden brown, about 10 minutes.