Easy, fast and healthy meals.... Is there such a thing?

I am at a loss right now as to what to feed my family.  I want healthy well balanced meals, light on the meat, that don't take a long time to make, that kids are likely to at least consider trying it.
I don't cater to my kids at all.  Sometimes I make dishes they like, however it is usually only if I can do so in a healthy way.  Get those processed foods out.  Make everything as much from scratch as I can.
The downside I have noticed lately is that I am spending way too much time in the kitchen, both cooking and cleaning up meals.
Due to the fact that we are a foster family, we have to be flexable.  We never know when we will get a placement, or how demanding that placement will be.  I have found myself more than once with a plan, including groceries allready bought, that I don't have time or energy to make because of unexpected plans.
The most demanding placement we had ended up with us eating out much more than we should, just due to stress, and time availability.
I feel like there should be answers out there, but I'm having trouble finding them.  Any suggestions?

Food Allergies?

Have you ever noticed that when you have a new limitation put on you, ideas for solutions are harder to come by?  I don't know if this is true for everyone, but it definitely is the case for me.  Lately Scooter has been having tummy troubles.  Quite often soon after eating, or even in the middle of a meal he will say his tummy hurts.  When we talked with the pediatrician he said it was most likely a milk and/or gluten allergy.  We have been watching for a while and haven't been able to rule out one or the other.  I finally decided to take a week and cut out all dairy.  Then if the trouble persists try a gluten free week and see how that goes.  I know there are many meals that don't have to have dairy in them, however I now find myself having a hard time coming up with very many.  Particularly breakfast and lunch (that a 5 year old will eat) meals.

Do any of you have suggestions of meals or tips that could help this path of discovery go better?