Soak the split peas in warm filtered water, sea salt and yoghurt for 6-8 hrs then rinse well. This is to make the peas more digestible but you can skip this step if you don't have time.
Heat oil on medium heat in a large pot and saute onion for a few minutes until the soften up
Add garlic, carrot, celery and potato and sweat with the lid on for 5 minutes
Pop in ham hock, chicken stock, water, split peas, bay leaf, sea salt and pepper and bring to boil
Turn heat down, cover and simmer for around 2 hours or until peas are cooked and soup has thickened.
Using tongs, remove hock and remove skin and fat and chop up the ham to use to top the soup.
Blend remaining soup to your preferred consistency.
Serve in bowls topped with chopped ham.
Serve with garlic bread