Watercress soup Tags Soup Vegetarian Difficulty Easy Cooking time 20 minutes Watercress soup 20 minutes Easy 3 bunches watercress 3 potatoes 3 onions 2 leeks 800ml stock 5 tbsp crème fraîche 4 10 minutes Starter Prepare the vegetables by peeling and chopping the potatoes, finely chopping the onions, leeks and garlic. Heat a littl …