Trim crust from bread. Cut the half-slice of bread into halves, making squares. Diagonally cut each square into halves, making triangles. Arrange the bread triangles in a shallow baking dish or pie plate. Micro-cook, uncovered, on 100% power for 30 seconds to 1 minute or until the bread is dry. Remove the bread triangles from the microwave oven. In a custard cup micro-cook butter or margarine, uncovered, on 100% power for 30 to 40 seconds or till melted. Drizzle over bread triangles. Sprinkle with Parmesan cheese.