Tuna And Green Olive Empanadas

Name: Tuna And Green Olive Empanadas
Ingredients: 1/4 cup extra-virgin olive oil; 1 large onion, finely chopped; 1 bay leaf; 2 medium tomatoes, seeded and minced; 1/2 rounded teaspoon pimentón (smoked paprika); One 6-ounce can tuna packed in olive oil, drained; 1/2 cup pitted green olives, chopped; 1 large hard-cooked egg, chopped; 1 tablespoon chopped parsley; Kosher salt; Two 14-ounce packages puff pastry; 1 large egg; 2 tablespoons whole milk