There is no way I would give my dc bread and butter for supper. Both dc have very different palates. DS loves sauces, gravy, casseroles, etc., but hates mash, mousse, chocolate ice-cream, buns, scones, fruit cake, etc. DD will only eat dry food - will not touch a gravy or a casserole although loves cheese sauce and creamy sauces (a bit now) but loves mousse and mash, and buns and scones and fruit cake, (and pickles) etc. I think it's a texture thing. When we have shepherds pie (ds will eat that mash), dd will have a burger or a chop. Actually DD lives on a burger, chop, chicken breast, piece of fish grilled or fried in a bit of butter with the same veg that we have.
I have always been pleased that both children love: meat, vegetables, fish, cheese, fruit, yoghurt, cereals, bread, olives, smoked salmon, soused herrings, etc.. They just like them served in different ways. I don't know why. They come from the same stable and have been offered the same things. I just adapt a bit.
I've always been grateful that the like the good stuff but just like it presentedin different ways. They also like lots of the bad stuff: pizza, sweets, chocolate, ribena, fruit shoots
, McDonalds, etc., but a bit of what you like form time to time does no harm.