Star fruit, or carambola, is a sweet fruit eaten like an apple but with a consistency almost like a big grape! Ripe star fruit should be yellow or with a slight amount of green tint, but without any brown spots (overripe). Dehydrating is simple. Then, you can eat the dehydrated product for a sweet on-to-go snack, or store for long term and rehydrate with boiling water to make relish, jams/preserves, or pickle it! It is sometimes baked into fish dishes in parts of China as well!
They will last many years if stored properly. Store in a jar with oxygen pack, or vacuum sealed bag. Keep out of direct sunlight.
Note: this fruit does not hurt the kidneys, but should be avoided in those who already have significant kidney problems.