String cheese is an excellent choice. So is a hardboiled egg -- or two. I don't count when it comes to nuts -- not even with Phase 1. My main interest was blood sugar, then weight loss, so if a handful of shelled pistachios slows my weight loss a tad, so be it.
Things that won't raise your blood sugar basically is meat, cheese and generally nuts. Almonds are pretty good, too, because of the really high fiber content. I go to Costco and get the big jars of roased peanuts and bags of almonds. I get my pistachios at Middle Eastern markets. I also have a rule of thumb about cheese -- if it won't melt, I won't eat it. I use grated parmesan as part of my omelets in the mornings.
Do be sure you eat enough. It's very easy to get into the eating to little trap and that can have the opposite effects. I eat large salads with all kinds of things in them. If I get hungry later, I eat. I don't worry about it. I found that the appetite decreased on its own.
I have also found that having a protein-heavy breakfast starts things out well and keeps the blood sugars in line for most of the day. I also, don't eat bread as a general rule.
This week, being toward the end of Ramadan, has been kind of off for me. There's a lot of socializing and incredible amounts of food. I try to make up for it by eating very little during the day or eating only protein/fat.
The last thing is to be sure you eat enough fat. That will do more for keeping the hunger pangs down than almost anything else. I often combine olive oil with Smart Balance margarine (no trans-fats) for my sauteeing needs. I also take the flaxseed oil gelcaps (1,000 mgs) for my omega-3, 6 & 9s.
Honestly, I have terrible eating habits -- I tend to eat on the run. Thankfully, most of the fast food places have workable salads. These days, my favorite is the garden salad with fire-grilled shrimp from Burger King. Decent greens, baby carrots, tomatoes, cucumber, red onion, a few croutons, and 10-12 decent sized shrimp. I sometimes toss the croutons, sometimes I add them to the salad -- I'm on Phase II, so I can.
I love big chef's salads for lunch. Anything I can find goes into them. I like to keep hardboiled eggs around to put in my salads. Also, 1/4 to 1/2 a cup of kidney beans thrown in is allowed, plus it adds vitamins, minerals, fiber and best of all, interest!
It gets to be second nature after a while.