Ham and Pea Soup

olive oil

onion (diced)

carrots (sliced)

celery sticks (diced)

g/14oz smoked gammon steaks or cooked ham if gammon not available (fat trimmed)

litres/6 cups chicken or vegetable stock

bay leaf

g/1 cup soup mix (lentils, split peas, barley, navy beans, etc)

cubes/2/3 cup frozen spinach

salt