This dish is amazingly simple and elegant. Inspired by Just Sonny's Restaurant in Jersey City, New Jersey.
Spinach should be cooked just until wilted, not overcooked. Garlic spinach mixture can be made ahead of time, if desired.
Use up to 3 sage leaves per cutlet, if desired. You can substitute dried ground sage if fresh sage is unavailable; just sprinkle each cutlet generously.
Cooking time for the cutlet rolls will vary depending on thickness. Do not overcook.