I use this Crock-Pot recipe. It is terrific. I store it in 2-cup portions in the freezer to grab for workday lunches. Way better than Campbell's.
http://allrecipes.com/Recipe/Slow-Cooker-Split-Pea-Sausage-Soup/Detail.aspx
Slow Cooker Split Pea Sausage Soup
Prep Time: 20 Minutes
Cook Time: 5 Hours
Servings: 8
1 pound dried split peas
10 cups water (I use mostly chicken broth and skip the bouillon below)
1 pound smoked sausage of your choice, sliced
5 cubes chicken bouillon
1 1/2 cups chopped carrot
1 cup chopped celery
2 potatoes, peeled and chopped (why peel?)
1/2 teaspoon garlic powder
1/2 teaspoon dried oregano
2 bay leaves
1 onion, chopped
In a 5 quart slow cooker, combine the peas, water, sausage, bouillon, carrot, celery, potatoes, garlic powder, oregano, bay leaves, and onion.
Cover, and cook on High for 4 to 5 hours. Remove bay leaves before ladling into bowls.
Edited so it looks prettier. 