I don't like tongue either, horrible stuff - mind you part of my problem with some food is textures, eg. I love toast with jam/other spread on, but I cannot stand sweet eg. jam/treacle sandwiches, or crisp sandwiches.
One thing I noticed, particularly as I have read the books in adulthood, is that the only time they generally had a cooked meal was at breakfast - for their other meals it was generally sandwiches or salad although tomato soup occasionally appeared, and scones and buns, so they did get quite a good diet on the whole. I have always been amused (as you can see in my sig) by Dick and his pickled onion craving in Wonderful Time, although I didn't really think it a wonderful idea as such when I first read it, because I thought everybody did it
But the daddy of them all has to be the breakfast they have in "Hike" when they all meet up again the next morning after they split up - like Keith Robinson says "Where IS this place? I want to go there"