Spicy Beef Empanadas

Name: Spicy Beef Empanadas
Ingredients: 1 lb ground beef; 1 onion (about 2.5 oz/ 75 g); 2 garlic cloves (grated); 3 tablespoons parsley (chopped ); 1 tablespoon cilantro (chopped ); ½ teaspoon smoked paprika; 1 teaspoon sweet paprika; 1 small jalapeňo (more or less to taste); 2 teaspoons ground cumin; 1 teaspoon ground coriander; 1 teaspoon chili flakes (optional and to taste); ½ teaspoon fine sea salt; ½ tablespoon olive oil; 2 tablespoons tomato paste; 3 cups all-purpose flour (13.2 oz ); 1 teaspoon fine sea salt; 1 cup unsalted butter (very cold); 2 eggs; ⅓ cup water (very cold ); 1 small egg; 1 tablespoon milk