I try to be relaxed about it. All 3 of mine were great wee eaters until they turned 1, then they seemed to refuse everything!
I make one evening meal. If there are elements of it that they don't like, I don't force them to eat it, but I do like them to at least try a new thing. I cook very varied meals, and have discovered what things they are likely to eat without too much fuss, and what things they just don't like. Unfortunately all 3 of them have very different tastes- you can't please all the people all the time!
DD1 would exist as a carnivore if I let her. She loves steak, chicken, lamb, all meat, and is in her element gnawing on a chicken carcase
Her very favourite food is grilled squid, which noone else in the family is keen on. She's a reluctant veg eater (will eat carrots and broccoli, and a few peas), but eats fruit.
DD2 likes her veg, will eat meat, but not that fussed and is absolutely phobic about fruit, after being forced to eat/try it at nursery. She literally shakes and gets upset if anyone tries to persuade her to eat fruit now, and won't sit next to her brother and sister if they are eating fruit, as she detests the smell. I never ever force it on her. She may change her mind when she is older, but as she eats plenty veg I don't see it being an issue.
DS loves potatoes, pasta and fish. Oh, and he loves prawns. He's not great at other meat, and is reluctant with veg (will eat carrots because they are orange! And peas) He is a voracious fruit-eater.
All three of them have been exposed to the same foods, and I don't cook separate meals. I never insist they eat everything on their plates, but we do have the "Dinner Winner" each night. This is either the first person to finish, OR the person who eats the best/ tries new stuff. Dinner Winner gets a badge, a song
and first pick of "pudding", which is often a cookie or cupcake. I know it's daft, but they do seem to eat better since we introduced it. It doesn't mean they force down things they don't like, but does seem to make them a bit more willing to try. There are things (eg peppers, onions) that none of them eat, and I don't put those things on their plates. If we are having these things, I always ask if they want to try and on occasion they have said yes, but then not liked it. That's fine.