Dice onion, carrot and celery into small pieces roughly the same size.
Rinse split peas and add to slow cooker.
Add diced vegetables, garlic, herbs and black pepper.
Pour in stock and water.
Cook on high for 5 hours or low for 8 hours in the slow cooker. You can also cook in a heavy based pan on the stovetop for 2 ½ hours.
Remove bay leaves and ham.
Shred the ham.
Mash a little or blend your soup depending on whether you want a chunky or smooth consistency.
If the soup is too thick for your preference, stir in some extra water to thin it out.
Add salt to taste and then divide between bowls. Scatter some of the shredded ham and chopped parsley over each bowl before serving.