I have a recipe that you can adjust so it is different for the different ages you need to serve. You would need 3 of these but they are easy to throw together.
Chicken Noodle Casserole
(for a 9X13 pan or similar size) Bake at 350 for 30-40 minutes (until hot)
2 cups of cooked chicken (2-3 boneles skinless breasts or several thighs whatever you have or like). You can boil them and then you have the broth for later in the recipe.
1 large bag of frozen veggies, use kid friendly for the kids and fancy for the adults. cooked and drained.
1 large bag of egg noodles, cooked a le dente or they get mushy.
1 can cream of whatever soup, use chicken for the kids and onion or mushroom for the adults.
1 can chicken broth or equivelent homemade.
Put chicken, veggies and noodles into the pan then mix soup and broth and pour over top and mix together.
Bake until hot.
add your choice of toppings like grated cheese, dry stove top stuffing mix, fried onions (like for green bean casserole) or whatever your family likes. If using cheese put back in the oven for a few minutes to melt the cheese
Serve with a salad or veggies and dip and rolls.