Cut the lettuce into a fine noodle. Peel the jacket potatoes while they are still warm, cut into slices and drizzle with stock. Finely dice the onions, press the garlic cloves, finely chop the tarragon and add. Mix with white wine vinegar, salt and pepper. Add the olive oil. Fold in the potatoes, salt and pepper again.
Don`t let it stand too long, otherwise the salad will be unsightly. Tastes great with pan-fried fish.