Chicken
Try it in a crock pot with whatever sauce mixed in to soften, or this was my staple early on... I would get a rottisserie chicken and dice it really really small then simmer it in Vodka sauce for an hour the long cooking really made it almost melt in your mouth. I would add a little ricotta for extra protein. It had to be very soft for me, now I have no problems. Acutally I find Chicken fills me up the most and for the longest.
You'll get there sister.
You'll get there sister.