Salto's grapefruit is naturally bitter, so candying it in heavy syrup was originally a way to make an otherwise hard-to-sell fruit profitable.
Grapefruit peel and pulp are simmered repeatedly in sugar syrup until sweet and firm, then sold by weight at Salto's fruit markets. It's often served as a simple dessert with a fork.
Why it's made this way: Grapefruit orchards are a major part of Salto's citrus economy alongside oranges, and candying is the department's signature way of processing the fruit for local sale.