Norwegian Betasuppe - cooking recipe

Ingredients

1 lb yellow split peas
1/2 cup ham, finely chopped
1 onion, finely chopped
1 tablespoon thyme
10 cups water
2 cups potatoes, diced
2 cups rutabagas, diced
2 cups celery root, diced
1 1/2 cups leeks, chopped
1 tablespoon salt

Preparation

Combine peas, ham, onion, thyme and water in a large Dutch oven and simmer for 1 1/2 to 2 hours.
Add potatoes, rutabaga, celery root, leek and salt. and cook for another 30 to 45 minutes.