Beef Pasties with Caramelized Onions and Stilton Cheese

INGREDIENTS

• 1/2 teaspoon dried thyme
• 1 cup white whole wheat flour or whole wheat flour
• 1/2 cup solid vegetable shortening (preferably nonhydrogenated), frozen
• 1 1/8 teaspoons salt
• 2 cups unbleached all purpose flour
• 7 tablespoons (or more) ice water
• 1/2 cup (1 stick) chilled unsalted butter, cut into 1/2-inch cubes
• 2 large onions, thinly sliced
• 1/2 cup dry white wine
• 1 large egg white, beaten to blend
• 1 teaspoon coarse kosher salt, divided
• 4 teaspoons olive oil
• 10 ounces skirt steak, cut crosswise on diagonal into 1/4-inch-wide strips
• 6 ounces coarsely crumbled Stilton blue cheese (11/3 to 11/2 cups), divided