Instructions
Put broth, split peas, onion, carrot, celery and shallot in a big soup pot.
Bring to a boil over medium-high heat.
Reduce heat and simmer, uncovered, for 1 hour.
Blend soup with an immersion blender. Add barley. Bring to a boil, reduce heat, and simmer about 45 minutes or until barley is tender. Add extra water if your pot doesn't close completely like mine and all the liquid evaporates, making the soup way too damn thick.
Season with salt and pepper.