In a pan over medium heat, melt the butter and soften the onion, carrot and celery for 5-10 minutes. Add the garlic for the final couple of minutes.
Lightly rinse the smoked ham hock under running water to remove any surface salt. Separately rinse the dried split peas in a colander. In the slow cooker combine the softened vegetables and garlic, split peas, ham hock, and water.
Cook on high for 6 hours.
Remove the ham hock, discard the skin and any bones. Shred the meat.
Carefully blend the soup mix with a hand blender. Add black pepper and stir.
Return the shredded meat to the soup, stir well and serve.
