Beef Pasties with Caramelized Onions and Stilton Cheese

Name: Beef Pasties with Caramelized Onions and Stilton Cheese
Ingredients: 2 cups unbleached all purpose flour; 1 cup white whole wheat flour or whole wheat flour; 1 1/8 teaspoons salt; 1/2 cup solid vegetable shortening (preferably nonhydrogenated), frozen; 1/2 cup (1 stick) chilled unsalted butter, cut into 1/2-inch cubes; 7 tablespoons (or more) ice water; 4 teaspoons olive oil; 2 large onions, thinly sliced; 1/2 cup dry white wine; 1/2 teaspoon dried thyme; 10 ounces skirt steak, cut crosswise on diagonal into 1/4-inch-wide strips; 1 teaspoon coarse kosher salt, divided; 6 ounces coarsely crumbled Stilton blue cheese (1 1/3 to 1 1/2 cups), divided; 1 large egg white, beaten to blend