5 stars: Love it! Would make it every week if my budget and belly could allow it. 4 stars: Very tasty, a regular for us. 3 stars: Alright, might make it every couple of months. 2 stars: Ate it, but not making it again. 1 stars: Couldn't even finish it.
1. Preheat the oven's broiler and set the oven rack about 6 inches from the heat source.
2. 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.
3. 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.
4. Cook under the broiler until the topping is golden brown, about 10 minutes.
*I didn't know I liked warmed grapefruit. When I first cooked this as per the directions above, the topping burned quickly. I tried it again, on low broil for only 6 minutes. It was better, but next time I will try to cook it in a preheated oven.