Flatten turkey to 1/4-in. thickness. In a shallow bowl, combine the flour, salt and pepper. In another bowl, beat egg and water. In a third shallow bowl, combine bread crumbs and cheese.
Dredge turkey in flour mixture, then dip in egg mixture and coat with crumbs.
Let stand for 5 minutes.
Melt butter in a large skillet over medium-high heat; cook turkey for 2-3 minutes on each side or until meat is no longer pink and coating is golden brown.