Ingredients
Vegetable stock
4 litres water
250 g mushrooms
5 thyme sprigs
4 bay leaves
2 leeks, trimmings only (or use 2 onions)
4 spring garlic, trimmings only (or use 4–5 garlic cloves)
Soup
150 g butter
2 medium brown onions, diced
2 leeks, pale parts only, washed well and chopped roughly
several large handfuls nettle leaves
1 kg potatoes, peeled and roughly chopped