Remember my home made chicken pieces I make for my ever picky child? Yes, the same exact one, I made it better. I marinade the flatten chicken pieces at least overnight in yogurt and honey Dijon mustard (the flavor my child like). I saw it at one cooking show on PBS. He said that it leaves the chicken tender and juicy. He wasn't kidding.
In addition to tenderness and juicy, you can really taste the spices you put in them while marinating. My child likes them more than before. If I can only add more vegetable variety in his diet, I will be a very happy mother.