The best advice I was given was to continue cooking a variety of meals but to remove the stress of others not eating/liking it provide a few accompaniments on the table so everyone can help themselves I.e. carrot sticks, cucumber, tomatoes, olives, garlic bread, wraps, cheese, nachos etc. (I tend to go for 2/3). This works well for us all and makes dinners a lot easier and enjoyable!
We also offer the dinner deconstructed to the littlest one who is super fussy. This means I know she will eat the plain spaghetti but may taste the bolognaise and who knows… one day she may even eat it! Hahahah!
Good luck!