I cook chicken thighs (higher in fat than breast) with fresh unsalted chicken stock (NOT cubes) in the microwave until no longer pink. This last point is very important as chicken needs to be cooked properly or you will end up with food poisoning. Once cooked, I chuck the lot in the blender and then freeze in trays. Defrosts very well in the fridge, or 30 sec in the microwave.
I actually cook most meats this way as we are still on the simple stuff too.
You may find on defrost that the meat is a little drier than when you cooked it, I just add a little boiled water to make the right consistency.
You can always get fancy with chicken casserole-type dishes which can be blended up, but for now I am sticking with simple. If you do go a little more complex, I would avoid onion if your lo is windy!