Be very careful when peeling mangos. They are an extremely slippery fruit and a very sharp knife is required to work with them. Just slice all 4 sides [or cheeks as they're known] away from the hard seed core. If the mangos are ripe enough, you can simply spoon the meat out of skins. If they're firm, carefully slice the meat from the skin with your sharp knife. Reserve 1 mango for your salsa finish.