1 sweet potato, washed and largely chopped peel on
1 large fennel bulb, largely chopped
½ lemon
10 sprigs parsley
10 sprigs dill
1 bay leaf
2 tbsp pepper corns
2-3 litres of water
Directions
In a large pot heat the olive oil on medium high. Add in the onions, garlic, celery, carrots, mushrooms, spinach, sweet potato and fennel.
Cover the vegetables with water. Place in the lemon, parsley, dill, bay leaf and pepper corns. Bring up to a boil, and then lower to a simmer. Allow to simmer for 2-3 hours.
Strain the stock and discard of the vegetables. Allow to cool completely then refrigerate for up to 3 days or freeze.