If you are not accustom to working with mangoes they are wonderful fruit you should try to use them more often. Some people find the sap irritates the skin so be careful to wash the fruit well especially if any sap is still around the stem. You can tell they are ripe when the skin is no longer green but has changed to yellow/red and the flesh is tender. To clean the mango start by standing it up balanced on the narrow end then slice down each side about one third of the way from center. You have to cut around the large almond shaped pit in the center of the fruit. Repeat on the other side. The two halves you have cut have about 80% or more of the useable fruit in them. Slicing carefully so that you don’t pierce the skin, cut across and down the inside of the halves making the size pieces you will want. Once you are done use your fingers and pop the mango inside out so that you can use a small knife to detach each cube from the skin
. If you don’t like mango or can't find any ripe ones you could opt for pineapple as a substitute.