Marinate chicken with lemon juice and soy sauce for 15 minutes.
In a skillet, sauté chorizo, then add butter, garlic, and onion.
Add marinated chicken and cook until lightly browned.
Sprinkle in flour, then pour water; stir to make a thick sauce.
Mix in carrots, green peas, mushrooms, sausages, and milk. Simmer until cooked.
Prepare crust by combining flour, butter, shortening, and ice water. Chill.
Roll out dough, place over the filling in a baking dish.
Brush with egg wash and bake at 375°F (190°C) for 30–35 minutes until golden.