I like plain oatmeal, made with splenda and 1/2 cup unsweetened chocolate almond breeze or pumpkin oatmeal (add a couple spoons of pumpkin to plain oatmeal and use sugar free syrup as sweetener, along with lots of spices). I'll add fiber powder to either to up the fiber count. If you buy a carton of oats instead of single serve, it's easy to adjust portion size to match calorie needs -
If you're going for more protein, I like Special K (protein version) or Kashi Go Lean with some splenda and unsweetened chocolate almond breeze, or hard-boiled eggs, mini veggie omelets, roasted chicken tenders, or turkey or ham cold cuts wrapped around sticks of your favorite cheese.
For desserts, I also like sugar free vanilla pudding with original Fiber One sprinkled on for crunch (excellent with some banana or berries), sugar free Tropical popsicles, or fruit "crisp" - fruit warmed/cooked in the microwave with spices and sweetener(unless they're already plenty sweet) and topped with a bit of granola.
I'm always looking for ideas too