Turkey Breast with Spinach-Feta Stuffing

Do not crush the turkey breast meat too much; it is tender and may tear. Spread the spinach mixture and roll up the turkey, secure it with twine.
Preheat a large saucepan over medium-high heat. Add 1 tablespoon of water and spinach; cover and cook for 5 minutes or until the spinach wilts, stirring occasionally. Tip the spinach mixture into a colander, squeezing until it is barely moist.Heat 1 teaspoon of oil in a small saucepan over medium-high heat. Add 2 tablespoons chopped shallots, 2 tablespoons water, and garlic; cover and cook for 3 minutes or until the moisture has evaporated. Transfer the shallot mixture to a medium bowl. Add the spinach, feta, breadcrumbs, oregano, 1/4 teaspoon salt, 1/8 teaspoon pepper, and egg white.Use a sharp knife to cut horizontally across the center of the breast, cutting the other side, but not through; open flat, like a book. Place the breast between 2 sheets of plastic wrap; beat to an even 1/2-inch thickness using a meat mallet or rolling pin. Remove the plastic wrap. Spread the spinach mixture over the turkey, leaving a 1-inch-thick rim. Roll the breast into a roll, starting on one short side. Secure with twine at 2-inch intervals. Rub the turkey evenly with 1/2 teaspoon salt and 1/4 teaspoon pepper.Preheat the oven to 325 degrees.Heat 2 teaspoons of oil in a large roasting pan over medium-high heat. Add the turkey; cook for 5 minutes, until browned on all sides. Remove the turkey from the pan. Add 2 tablespoons of shallots to the pan; saute for 30 seconds. Add the wine and scrape off the pan until the pieces are browned. Add the turkey and stock to the pan; bring to a boil. Cover and bake at 325 ° for 40 minutes or until the thermometer placed in the thickest part of the turkey reads 170 °. Remove the turkey from the pan; keep warm.Put the pan on the stove over high heat. Combine the cornstarch and 1 tablespoon of water, stirring with a whisk. Add the cornstarch mixture to the pan; bring to a boil. Cook for 1 minute or until slightly thickened, stirring constantly. Remove from heat. Add the butter, stirring with a whisk. Remove and discard the turkey twine. Cut the turkey into 8 slices. Serve the sauce with the turkey. Garnish with oregano sprigs if desired.