Put the vegetables into a stockpot, cover with 1.5-2 litres cold water and bring to the boil. Lower the heat and simmer for about 10 minutes. Add the herbs, garlic and spices. Simmer for a further 2 minutes, then add the white wine and lemon wedges. Remove from the heat and leave to cool completely.
Chill for 24 hours, dividing the stock into smaller batches if