Sorry it took me a couple days to find this thread. Don't know if you still have your ham bone but here's a recipe that I like. This soup is excellent and it really does taste a lot like split pea soup.
Based on a recipe from genaw.com (Linda’s Low Carb Recipes)
PRIMAL "SPLIT PEA" SOUP
1 ham bone with meat on it
8 cups water
16 ounces frozen cauliflower
16 ounces frozen green beans
Salt and pepper, to taste
Onion, carrot and celery*
Put the ham bone in a large soup pot. Add the water; bring to a boil. Cover and simmer until the meat is starting to fall off the bones, about an hour. Remove the ham bone from the broth and set aside to cool. Meanwhile, add the cauliflower and green beans to the broth in the pot. Bring to a boil; cover and simmer until the vegetables are very tender, about 30 minutes. Puree the soup with an immersion blender until smooth. Remove the meat from the bones, cut into bite-size pieces and add to the soup. Adjust the seasoning with salt and pepper, to taste.
* In a medium skillet, sauté in butter until very tender:
1 small onion, diced
1 large carrot, diced
1 stalk celery (with leaves), diced
Add to the finished soup before adjusting the seasoning. Cook until heated through. You could also add the raw vegetables to the pot along with the cauliflower and green beans and puree everything together. I like to put some in with the mix to be pureed and then have some onion/carrot/celery pieces in the soup.