Lay the dragon fruit on its side on a cutting board. Using a sharp knife, slice the dragon fruit in half lengthwise.
Use a large spoon to carefully scoop out the flesh into two large halves. Discard the dragon fruit skin.
Cut into desired shapes and sizes. These are my favorite three cuts:
Thin slices: Turn the dragon fruit cut side down, then cut thin slices crosswise from the top to the bottom.
Wedges: Turn the dragon fruit cut side down, then cut wide slices around the curvature of the dragon fruit in the opposite direction as the top and bottom of the fruit.
Bite Sized Cubes: Follow the steps for cutting the dragon fruit into wedges and then cut each wedge into bite-sized chunks.