I do 2 oz of Deli Meat most mornings for a half. It's the easiest thing to measure out.
If you go for soy beans, it's one cup, or roughly 5 ozs if they're still in the shell. Also 2 1/2 Tbsp of Nuts, I round it up to 3 and count it as a 1/2 P and a Fat if I need to squeeze a fat in.
3 Veggie Chicken Nuggets and 1 Turkey Burger (most pre-fabbed are 4 oz each) round out my trusty list of half proteins.
Can you tell I've been on red for a while?