Ask Felicity Cloake: readers grill our resident culinary perfectionist

Felicity Cloake: ‘Things I usually have on hand to make life easier include fried shallots, Gentlemen’s Relish, frozen spinach, sauerkraut and kimchi, pecorino or parmesan, eggs, tinned fish and chilli oil.’ Photograph: Linda Nylind/The Guardian

What is the logic behind the foods deemed suitable for the British breakfast? Traditionally, we eat bacon but not ham, kidneys but not liver, haddock but not cod, kedgeree but not curry. I know there are individual and regional variations, but the taboos still seem eccentric.
Matthew, Aberystwyth