Tandoori Chicken Wraps

Name: Tandoori Chicken Wraps
Ingredients: 2 cloves garlic, peeled; 1 (3-inch) piece fresh ginger, peeled and roughly chopped; 1/2 small red onion, roughly chopped, plus 1/4 of the onion, thinly sliced; 1/2 cup plus 2 tablespoons 2% Greek yogurt; 1 tablespoon olive oil; 4 teaspoons tomato paste; 2 teaspoons hot paprika, divided; 1-1/2 teaspoons ground coriander; 1-1/2 teaspoons ground cumin; 1 pound boneless, skinless chicken thighs; 2 tablespoons chopped fresh cilantro; 1/4 teaspoon kosher salt; 4 whole wheat flatbread wraps; 4 large pieces Romaine lettuce; 1/2 cup grape tomatoes, halved