Shrimp Empanadas

Name: Shrimp Empanadas
Ingredients: 12 tablespoons cold unsalted butter, cubed; 3 cups all-purpose flour; ½ teaspoon salt; 1 large egg; ½ cup ice-cold water; 1 lb shrimp, chopped; 4 garlic cloves, minced; ¼ cup low-sodium chicken stock; 2 tablespoons olive oil; 1 medium onion, finely diced; 1 teaspoon lemon zest; ½ teaspoon chili powder; 3 oz dried chorizo; Salt and black pepper, to taste; 1 tablespoon water; 1 egg; 1 bunch fresh cilantro; Juice of 1 lime; ¼ cup Greek yogurt; 4 scallions, chopped; ¼ cup water