Step 1

Position rack in upper third of oven; preheat to 400 degrees F.

Step 2

Combine vinegar, cayenne and salt in a large bowl. Very thoroughly pat chickpeas dry, then toss with the vinegar mixture. Spread on a rimmed baking sheet. Roast the chickpeas, stirring twice, until browned and crunchy, 30 to 35 minutes. Let cool on the pan for 30 minutes; the chickpeas will crisp as they cool.