Start but cutting it in into two halves, maneuvering your knife around the pit. This will leave you with two mango "cheeks". Using a pairing knife, make 4-5 evenly spaced horizontal cuts in the fleshy side of the mango, then make 8-10 horizontal cuts. This will create a grid-like pattern. Next, press the mango inside out, then use a paring knife to chop off all of the little mango squares.