Set up grill for direct grilling and preheat to medium high. Brush and oil the grill grate. Grill sausages, turning frequently, til casings are crisp and nicely browned about 5 minutes. Move sausages to perimeter of the grill or to a warming rack. To make the French toast, put eggs and maple syrup in large bowl. Using a whisk beat just to mix. Whisk in milk and vanilla. Dip each slice of pound cake in egg mixture, letting it soak for 2 to 4 seconds per side. Put the cake slices on hot grate on the diagonal and grill til lightly browned, 2 to 4 minutes per side. Transfer French toast to a platter and sprinkle with powdered sugar. Serve with fresh berries and/or maple syrup. Makes 4 servings.