Brazilian Empanadas

Ingredients

• 3 cups flour
• 1 teaspoon salt
• 1/2 teaspoon turmeric
• 10 tablespoons unsalted butter
• 6 tablespoons shortening
• 1 egg
• 1/2 cup beer
• 1 small onion, cut into 1/2-inch dice
• 2 plum tomatoes, cut into 1/2-inch dice
• 1 (14 ounce) can hearts of palm, drained and palms cut into 1/2-inch dice
• 2 tablespoons butter
• 1/2 cup sherry wine
• 1 tablespoon tomato paste
• 1/2 lb shrimp, peeled, deveined, and cut into 1/2-inch dice
• salt & freshly ground black pepper
• 1 egg yolk
• oil, for frying