First, slice your mango lengthwise downwards on either side of the seed. Try to slice the mango as close to the seed as possible, so as to not waste any of the fruit! Next, keep the mango in its peel and slice vertical lines across, followed by horizontal slices afterwards. The mango should now look like cubes, but still be attached to the peel. Next, turn the peel inside out and push the mango cubes into a bowl. You may need to use the back of a spoon, a spatula or a knife to help separate the fruit from the peel.