Spiced Lamb Hand Pies

Name: Spiced Lamb Hand Pies
Ingredients: 3 tablespoons white wine vinegar; 3 tablespoons dried currants; 2 tablespoons olive oil; 1 small onion, finely chopped; 1 small garlic clove, finely chopped; Kosher salt and freshly ground black pepper; 1 tablespoon tomato paste; ¾ teaspoon ground cumin; ¾ teaspoon ground ginger; ¼ teaspoon ground cardamom; ¼ teaspoon ground turmeric; ½ pound ground lamb; 1 cup canned crushed tomatoes; ⅓ cup frozen peas; 2 tablespoons chopped fresh parsley; All-Butter Pie Dough (click here for recipe); All-purpose flour (for surface); 1 large egg, beaten to blend