Empadinhas de Palmito

Ingredients

• 2 cups all-purpose flour
• 1 teaspoon salt
• 1/2 cup unsalted butter, cold and cubed
• 1 egg
• 2-4 tablespoons cold water
• 1 tablespoon olive oil
• 1 small onion, finely chopped
• 2 cloves garlic, minced
• 1 can (about 14 oz) heart of palm, drained and chopped
• 1/2 cup cream cheese
• 1/4 cup milk
• 2 tablespoons cornstarch (dissolved in a little cold water)
• Salt
• black pepper
• Chopped parsley for freshness
• 1 egg, beaten (for egg wash)