What you'll need
1 oz butter or margarine
1 small or ½ medium celeriac, chopped
2 tbsp cider vinegar
1 large leek, chopped
2 cloves garlic, chopped
1 whole head of fresh Fenland Celery with leaves, chopped (reserve some leaf for garnishing)
850 ml vegetable or chicken stock
150 ml milk
75g Stilton cheese
Salt and pepper
For the croutons:
1 small white loaf (1day old), cut into small cubes
2 tbsp olive oil
50g Cheddar, grated