Oh, I adore mushrooms! Yum!!
Also, eating more chicken and fish is apparently better for the environment (they don't emit methane/green house gasses the way cows and sheep do). Eating unprocessed foods is DEFINITELY better for your body.
Have you thought about what you're allowed to drink? If you're going off dairy, I guess that limits you to water and black/green/herbal tea? Maybe fruit juice, but remember even natural juice is high in fructose (unprocessed sugar, a lot better for you than processed sugar, but can add up to lots of cals).