Wash the potatoes and cook for about 20 minutes. Then quench, peel and let them cool down. Peel onion and cut into fine strips
Roast pumpkin seeds in a pan without fat, remove and let cool. Heat 1 tablespoon of oil in the pan. Sauté onion in it. Add 1/8 l water, broth and vinegar, bring to the boil. Season well with salt and pepper. Add the rest of the oil.
Cut the potatoes into slices. Pour hot marinade over them. Leave to infuse for at least 30 minutes
Clean, wash and drain the lamb's lettuce well. Season potato salad to taste. Fold in lamb's lettuce and pumpkin seeds. Serve with ham and sprinkle with pumpkin seed oil
Drink: cool mineral water