2 blood oranges
2 clementines or mandarins
About 1/4 small red onion
4 teaspoons red wine vinegar
2 tablespoons best quality olive oil
8 to 10 green olives, pitted and torn into quarters
Piment d'espelette (or other ground chile, like cayenne), to taste
Flaky sea salt, like Maldon
Cut the peel and pith from the oranges and clementines, making sure to remove all of the outer membrane without losing too much of the flesh. Cut the oranges and clementines into 1/8-inch slices. Slice the red onion thinly enough that you can see through the slices; use a mandoline if needed. You will need about 8 slices.
Arrange the citrus in overlapping slices on each of four plates. Disperse the sliced onion on top. Sprinkle with the vinegar, 1 teaspoon per plate. Drizzle the olive oil over each plate, about 1/2 tablespoon per plate. Divide the olives among the plates. Sprinkle with piment d'espelette, a generous pinch per plate. Season each salad with salt. Admire all the colors, then serve!