Lamb and Beef Burek

Name: Lamb and Beef Burek
Ingredients: 1 tablespoon olive oil; 12 ounces ground lamb; 12 ounces ground sirloin; 1 medium onion, small dice; 1/2 teaspoon ground allspice; 1/2 teaspoon smoked paprika; Kosher salt and freshly ground black pepper; Nonstick cooking spray, for greasing; 9 sheets store-bought phyllo dough, thawed; Whole-milk Greek yogurt, for serving; 2 tablespoons chopped fresh dill; 2 tablespoons chopped fresh mint; 1 lemon, zested; 2 tablespoons olive oil; 2 tablespoons whole-milk Greek yogurt; 1 large egg