Pre-heat oven to 400 degrees.
Thinly slice the sweet potato to approximately 1/4 inch thickness. Use the wider parts of the potato, and aim for approximately 20 slices (enough to fill a sheet pan).
Spread the slices all over a sheet pan, filling as much of the pan as possible. Slices can be touching.
Place the tray in the oven. Bake for approximately 15-20 minutes, or until the rounds have softened, but are still somewhat sturdy.
When finished, put a dollop of guacamole on top of each round. Serve!