Traditional Grocery

Ingredients
2 tablespoons vegetable oil
1 medium yellow onion, diced
2 ribs of celery, diced
3 medium carrots, peeled and roughly chopped
1 ham bone or 2 small smoked ham hocks (see notes)
1 to 1-1/2 cups diced ham
4 cups low-sodium chicken broth
2 to 3 cups water
1 lb (about 2-1/4 cups) dried split peas
1 bay leaf
Salt and freshly ground black pepper