It could be that your insulin sensitivity is increasing before your body is adjusting its insulin output after a meal. That's a formula for post-prandial hunger, and I hope it's just a phase you're going through. I have a family history of hyperinsulemia, and after a meal with just 3-5 oz. of protein — without fat — I want to keep eating.

So, like others have posted, I've added more fat to my plan — a lot more. To keep my caloric total to about 1800 calories, I make sure 50-65% of my intake is fat. I find fat sating. It's gotten to the point where I feel like I'm starving after eating sirloin, but I'm jolly after eating a piece of chuck steak.

My latest adaptation is to have 4 tb. of melted tallow, 2 tb. coconut oil, and 1 tb of cod liver oil for breakfast. It fuels me for 3.5 hours, and I'm not hungry in the interim. I'm probably on one end of a bell curve for liking fat, but c'est la vie.