Cook wheat berries in a pot of boiling water until tender, about 30 minutes.
In a large pot, heat oil.
Add celery, onion, mushrooms and garlic. Saute until softened, about 5 minutes.
Add chicken broth, bouillon cube, carrots, thyme and pepper. Bring to a boil. Reduce to a simmer and cook for 30 minutes.
Add chicken and condensed soup. Simmer for 5 minutes.
Add wheat berries and cook until heated through, 2 minutes.
Add parsley and stir to combine.
Serve warm.