first dice up the potato & fry in the oil in a frying pan.
whisk the eggs; the more you whisk, the lighter & fluffier it will end up.
dice up the pineapple.
once the potato is crispy/browned, add the egg, followed by the sweetcorn & pineapple. stir around so that its all mixed in evenly, and fluff up the egg.
keep it on the heat until the underneath is browned, then either flip it over to do the other side, or place under the grillo brown off the top.
you could also add peas, onions, meat etc