Cost per Serving:
1. Line with foil a baking tray that fits inside your toaster oven (or use a small disposable foil tin). Fold crepe in half and spread cheese on top side, leaving a 1/2-inch border. Place, cheese side up, on tray and toast until cheese warms, about 30 seconds. Transfer to a plate.
2. Lay slices of roast beef on top of cheese, then spread Dijonnaise or horseradish cream on top. Top with salad greens. Fold sides in to form a wedge shape. Serve immediately.