You will find the Phase 1 Food Lists (posted in the Chit Chat and Phase 1 sections above) will detail this for you, but to sum up: you can have reduced fat or low fat cheeses (such as made with 2% milk). I have a part skim mozzarella string cheese stick for my morning snack every day. As for nuts, you can have 15 per day (30 if pistachios since they are smaller). Try to use the dry-roasted kind. I can't find dry-roasted cashews...not even sure if they come dry-roasted. I like to use the tiny Glad-Ware containers to make up my own nut cups using 5 almonds, 5 cashews, 3 pecans halves, and 2 macadamia nuts. I sit there on Sunday afternoons and make them...they are so easy to just grab on the go...or if I am travelling, they are easy to dump into a mini snack ziploc bag and throw in my purse.
Phase 2 snacks are things like Pudding made with skim milk, peanut butter on apples or my favorite iss a little light cream cheese or peanut butter on a sourdough rye crisp with sugar free jam. HOLY SMOKES!!!! it's great!