I love my mothers Split Pea Soup recipe. It alwyas gets rave reviews and is so simple.

Split Per Soup
1 lb bag green split peas rinsed.
1 large cooking onion
2 large carrots sliced
2 large ribs celery chopped
2 tap. salt
1 tsp. pepper
1 tsp dried thyme
1 large bay leaf
One ham bone
6 cups water

Saute the onion, celery, and carrot in a bit of oil. Add all the rest, bring to a simmer and cook for 2 hours. Remove the ham bone. take meat off the bone and add it to the soup. Add a dash of sherry and serve.