Wash oranges and slice into 1/8-inch rounds.

Place slices in a saucepan with water and bring to a boil.

Simmer for 15 minutes, then drain.

Return slices to pan with sugar and fresh water.

Heat until sugar dissolves, then bring to a gentle boil.

Reduce heat and simmer 45–60 minutes until slices are translucent.

Transfer slices to a wire rack to drain.

Let dry at room temperature 12–24 hours or in a low oven.

Roll dried slices in sugar to coat.

Let set until fully dry, then store.