Step 1

For the onions: Preheat the oven to 400 degrees F.

Step 2

Bring the vinegar, sugar and salt to a simmer in a small saucepan over medium-high heat to dissolve the sugar. Place the onions in a small bowl and pour the hot mixture over them. Toss well to coat. Allow to cool to room temperature for 1 hour before using.

Step 3

For the chickpeas: Meanwhile, toss the chickpeas with the olive oil, lemon zest, zaatar and salt. Spread on a rimmed baking sheet and roast until golden and crisp, about 30 minutes. Drain well on paper towels.

Step 4

For the salad: Place the Tuscan kale in a large bowl. Add 1/4 teaspoon salt and massage the salt into the kale. Add the olive oil, vinegar and remaining 1/4 teaspoon salt. Add 1/2 cup of the onions without their liquid, all of the chickpeas, feta and zaatar. Toss to combine and serve.