Step 1

Heat broiler to high with the oven rack in the highest position. Toss chickpeas, onion, and lemon with 1/4 cup oil, 3/4 teaspoon salt and 1/4 teaspoon pepper on a rimmed baking sheet. Broil, shaking sheet halfway through, until onions are beginning to brown, 5 to 8 minutes.

Step 2

Meanwhile, rub salmon with remaining teaspoon oil, spice mix and remaining 3/4 teaspoon salt and 1/4 teaspoon pepper. Remove the baking sheet from the oven and lower oven temperature to 300°F. Scoot the chickpeas, etc. toward the edges of the baking sheet and place salmon in the center. Return to the oven on the center rack and bake until salmon is opaque and just cooked through, 15 to 20 minutes.

Step 3

Place ingredients in a dry jar or resealable container — even a plastic baggie will do — and shake or stir to combine. They should last a couple of months in the cupboard.