Chicken Empanadas Recipe

Name: Chicken Empanadas Recipe
Ingredients: 2 tablespoons olive oil; 1 yellow onion (diced); ½ cup diced poblano pepper; 4 cloves garlic (chopped); 1 teaspoon kosher salt; ½ teaspoon freshly ground black pepper; 1 ½ teaspoons ground dried chipotle pepper; ½ teaspoon ground cumin; ¼ teaspoon dried Mexican oregano; 1 pinch cayenne pepper (or to taste); 3 cups diced cooked chicken; 2 tablespoons dried currants; 2 10 ounce cans diced tomatoes with green chile peppers (such as RO*TEL®); ⅓ cup water; ¾ cup grated pepper Jack cheese (Optional); 1 large egg (beaten); 2 teaspoons water; 3 cups all-purpose flour; 1 ½ teaspoons kosher salt; 1 teaspoon white sugar; 12 tablespoons cold unsalted butter; ⅓ cup cold water (or as needed)