Curry Crusted Leg of Lamb with Pomegranate Raita

Name: Curry Crusted Leg of Lamb with Pomegranate Raita
Ingredients: 1 1/2 cups Greek yogurt; 2 tablespoons pomegranate molasses; 1/2 cup coarsely chopped cucumber; 1/4 teaspoon ground black pepper; Kosher salt; 1 tablespoon chopped fresh mint leaves, optional; 6 tablespoons ancho chile powder; 4 teaspoons ground cumin; 4 teaspoons ground coriander; 4 teaspoons ground fennel; 4 teaspoons ground turmeric; 2 teaspoons ground cardamom; 2 teaspoons ground cloves; 2 teaspoons ground chile de arbol; 2 teaspoons ground black pepper; 1/4 cup canola oil; 1 boneless (5 to 7-pound) leg of lamb, butterflied; Canola oil, as needed