Trim the ends from the citrus, and working one at a time, cut off the peel from top to bottom. Slice the fruit into 1/4 inch rounds, removing any seeds you encounter.
Arrange the citrus on a plate or platter with a slight edge to hold in the juice.
Stir together honey and cinnamon. Drizzle the spiced honey all over the oranges.
Garnish with torn mint and serve at once.
Notes
You can make the salad up to 6 hours in advance. Hold off on the mint, keep the salad chilled, and garnish with mint just before serving.