sweet potato chicken soup with barley

Ingredients

• 2 teaspoons olive oil
• 1 large spanish onion, peeled and diced
• 3 cloves garlic, peeled and minced
• 1/2 cup celery, diced
• 3 cups carrots, sliced
• 2 - parsnips, grated
• 4 large sweet potatoes, peeled and diced
• 1 1/4 cups pearl barley, uncooked
• 2 1/2 - 3 quarts chicken stock (or broth)
• 3 cups boneless chicken breast, poached and diced
• 1/4 cup fresh dill, chopped
• - kosher salt & fresh groud pepper, to taste