Ingredients that need to be prepared in advance include: 1 grapefruit and 1 lemon.

1. The first step is to wash and dry the prepared fruits. 2. Then use a fruit knife to slice the fruits and place them on the grill. 3. The drying time will be shorter if the slices are thin, and longer if they are thick.

4. Put it in the oven and use the dried fruit function to bake for 6 hours. The specific drying time depends on the fruit and the thickness of the cut. Once it is completely dry, it can be removed and sealed for storage.

5. Take it out after 3 days and it’s done.