Wash the potatoes and cook in a little salted water for 15-20 minutes. Peel and chop the onion. Cut ham into cubes. Cut cucumber fan-like. Peel potato skin. Cut potatoes into slices.
Fry the onion and potatoes in hot oil in a pan until golden brown, season with salt and pepper. Whisk the egg with 3 tablespoons of water, pour evenly over the potato mixture. Fry over medium heat for 5-10 minutes until the egg has set.
Rush farmer's breakfast onto a plate, sprinkle with ham and fold over. Garnish with cucumber, tomato wedges, parsley leaves and chopped parsley.