Peel, wash and dice the potatoes and cook them in boiling salted water for about 15 minutes. Drain artichoke hearts, rinse briefly and drain. Wrap 1 slice of bacon around each artichoke.
Roughly chop the walnuts. Roast in a pan without fat. Take out and let it cool down. Heat 1 tbsp. oil in a frying pan. Fry the bacon artichokes for 3-4 minutes. Drain on kitchen paper.
For the vinaigrette, peel and finely dice the onion. Finely mash the potato with a fork. Heat 1 tablespoon of oil in a frying pan. Fry the onion in it. Deglaze with vinegar, 100 ml water and stock, bring to the boil.
Stir in the potato. Season to taste with salt, pepper and sugar. Leave to cool.
Clean, wash, shake dry and chop the salads. Mix salads, nuts and potato vinaigrette. Place artichokes on top.