International
Rinse the split peas and pick out any stones.
Heat the oil in a large pot and cook the chopped onion, carrots and celery over medium heat for 6 to 8 minutes; add the garlic for the last minute.
Add the peas, ham hock, water and bay leaf, bring to a boil and skim the foam.
Simmer partly covered for 1.5 hours, stirring now and then, until the peas fall apart and the meat is tender.
Lift out the hock, remove the skin and bone, shred the meat and return it to the pot.
Season with salt and pepper, remove the bay leaf and add a little hot water if the soup is too thick.