Cut the grapefruit in a half and place it cut side down on a paper towel to dry. Melt the honey with a tablespoon of hot water.

Turn on the grill of the oven and line a baking tray with parchment paper.

Arrange the grapefruit cut side up on the baking tray, drizzle with the honey syrup and sprinkle with cinnamon.

Broil for 10-12 minutes until caramelized. Eat warm with a dollop of yogurt.