I agree w/ the other posters, there's something about the foods that we grew up that we crave when we are sick or down. We need comforting right then and those memories feel like warms hugs. That said, I think being prepared before we are ill is the way to go. Have suitable foods that mimic those from your childhood. Example: When I'm feeling down my mind goes to my mom's meatloaf and mashed potatoes and gravy or swedish meatballs...mmmm. I can easily make that veggie w/ a veggie burger and a can of mushroom gravy over it and my potatoes (not a health meal obviously..lol but those memories just are what they are, aren't they?) Keep your comfy foods handy for those times that you need them, think of them as your emergency kit.
I'm a veggie mom living with a nonveggie family. My family does go along with what I cook. I'm a little bit stubborn in this area, not that I hold all out protests or anything BUT if I'm cooking, I'm choosing what will be cooked. I make sure everyone at least likes what I'm making and may make some adjustments along those lines, but I figure that I'm the mom and will serve what's "healthy" most of the time. I learned a while back that asking everyone what they wanted for dinner was causing me to run circles in the kitchen. So now if I ask, I choose a style or country (italian, mexican, junk food fest on a Friday night..etc) I have learned to make veggie foods delicious and fun. All but my little guy, "the food critic" raves about it. I have to use the mommy card on the little one sometimes or he would NEVER eat a fruit or vegetable. Remember, you are setting up future memories for your little guy right now, what will his "comfy food" memories be when he grows up and doesn't feel well?