How to Make It
Layer peas and next 9 ingredients (through ham) in order listed in a 6-quart electric slow cooker. Gently pour 6 cups water over top. Cover and cook on LOW for 8 hours.
Remove ham hocks from slow cooker. Remove meat from bones, and cut into bite-sized pieces; discard skin and bones. Discard bay leaf.
Coarsely mash soup to desired consistency, adding additional hot water to thin, if desired. Stir in chopped ham. Divide soup evenly among 8 bowls; top each serving with 1 tablespoon sour cream.