Vegan Braised Kale and Chickpea Sandwich With Sumac Onions Recipe

Ingredients (17)

• For the Sumac Onions:
• 1 small red onion, thinly sliced by hand or on a mandoline (the thinner the better)
• 1 teaspoon dried ground sumac berries
• 1/2 teaspoon toasted sesame seeds
• Kosher salt
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• For the Kale and Chickpeas
• 2 tablespoons extra-virgin olive oil
• 2 cloves garlic, grated on a microplane grater
• 1/2 teaspoon red pepper flakes
• 1 bunch kale, stiff stalks discarded, roughly shredded by hand (about 1 pound)
• 1 (14-ounce) can chickpeas, with their liquid
• Freshly ground black pepper
•  
• To Assemble:
• 4 slices pizza bianca or other sandwich bread, split and lightly toasted
• Vegan mayonnaise to taste