Bay Ridge Empanadas

Name: Bay Ridge Empanadas
Ingredients: 1 tablespoon olive oil; 1/2 small onion, chopped; 2 cloves garlic, minced; 1/2 pound ground beef; 1/2 teaspoon ground cumin; 1/2 teaspoon curry powder; 1/2 teaspoon chili powder; 1/4 teaspoon allspice; 1/4 teaspoon dried thyme; Pinch ground cinnamon; Kosher salt and freshly ground black pepper; 1/2 cup frozen corn, defrosted; 1/2 cup shredded white Cheddar; 4 tablespoons unsalted butter; 1 tablespoon sazon seasoning; 12 store-bought (6-inch) empanada wrappers; 1 egg, lightly beaten