Wow. Ok, I am not trying to be mean, but it sounds like your entire family has some very serious food issues.
Eating is a fundamental part of how we relate to one another and how we feel about our bodies and what we put into them. Your husband is a GROWN MAN- I can't believe that his mother didn't feed him regular dinners growing up! How and when did he just decide that it was ok to eat nothing but cereal and microwave dinners???
What does he eat if you are with another couple? At a family event? Out in a restaurant?? He CAN eat whatever you cook- it just sounds like he is a big baby and WON'T eat your food and I'm sorry, but that is just disrespectful to you as well as being very unhealthy on many different levels.
Your children are going to take their behavior cues about food from what they learn at home. It sounds like they already are. Do you OR your husband really think that is a healthy way for them to be? They will pattern how they eat on what you and he do- does he want them to grow up and only eat cereal and frozen dinners? Childhood obesity and all kinds of other health issues are directly connected to how your kids eat. If your husband won't change his weird eating ways out of respect for you and the meals you try to make- then will he do it for his kids' health at least?
I have never made my son a separate meal in his life. Sure, we sometimes eat mac and cheese or things like that- but no food marketed as 'kid' food. He eats what we eat and always has since he started to eat solid food. This is how most European babies eat and their kids are much healthier than ours!! Just keep encouraging them to eat whatever you offer- it takes SEVERAL tries for young taste buds to accommodate to new flavors- don't be discouraged- just KEEP OFFERING REAL FOODS!
As for your husband, I think you should speak to your family doctor about this, because it is really unhealthy. Ask your doctor to talk to you and your husband together and to refer you to a nutritionist! A good nutritionist will not only be able to give your husband all the medical reasons why his habits are so unhealthy, she can help YOU come up with family meal plans that will be healthy and satisfying for everyone and get you out of your rut!
This is a big deal- mealtimes when families gather around the table and share food that they've prepared together help keep families happy and connected to each other. I work FULL TIME and don't get home until 6 PM most nights, so I just have to plan ahead on the weekend a little more to make good dinners. It is NOT that hard!
Two practical things: get a Crock-Pot or slow cooker. You can find lots of great recipes for it, it is super easy and if you are pressed for time, you just toss everything into it in the morning, turn it on simmer- and a few hours later you have a pot roast with veggies, hot soup or a casserole waiting for you. Easy!
Also, try subscribing to Cooking Light magazine. If your husband is eating Healthy Choice, maybe he is concerned about weight or something like that. But fresh homemade meals are better than that stuff and less expensive too. Cooking Light always has a lot of fast, easy recipes and maybe you and your husband could look through it together and pick a few each month to try. Just to sort of get you both into the 'groove' of cooking instead of defrosting!
As your kids get older you will find it harder and harder to make that happen- so start it now! My son is almost 10 and LOVES to help me cook dinner and even to cook for us (with a little mom help) on 'his' cooking night.
Go to a nutritionist together!!