As covered in a great many other places I don't like tomatoes and tomatoes don't like me (if one enters me it exits at pace one way or the other and I really dislike the taste, seems to be a family thing as well as going back various ones before me did not like them at all and various cousins do today despite us growing up with very different diets). It is a pain in the arse as tomatoes are a cheap bulking ingredient, something of a flavour enhancer and are thus put in everything -- crisps, endless sauces, pickles/chutneys, chips, pies... basically means I cook most things myself even if was not cheaper and tastier.
I am not a great fan of smoked things, can eat them to be polite but never seek them. Absolutely adore preserved meats though -- jerky, billtong, kilishi, pemmican, various cured sausages... all day long really.
Also not a great fan of salty things. By extension soy sauce is absolutely disgusting, only exception being kicap manis/kecap manis which is soy sauce, absolutely loaded with sugar and boiled down into a thick syrup (you tend to find it in Indonesian and Dutch foods). This dislike of soy also very much extends to soy milk.
Even ignoring the smokey things then somewhat limited in fish choices -- tilapia is not a thing around here really but it is a boring as cod. Haddock, skate and bream are my favourites otherwise. Tuna (proper steak, not what Americans have in a can) and swordfish also up there.
Not a fan of white sauces on meat. Will happily have it with pasta or rice or vegetables but put it on my steak and I will accuse you of either ruining a good steak or covering up for a bad one by making it worse.
You can keep your aubergines (eggplant if you prefer American names), courgettes (zucchini) and beetroot. Squashes only sparingly in a curry or if prepared by someone that knows what they are doing. Can't get enough pumpkin though.
Don't like bacon (won't eat it at all) and don't think I have ever sought out pork/ham/other pig products... and would infinitely rather have beef, lamb, chicken... basically anything else. Will eat pork mince in sausages, scotch eggs, sausage rolls, sausage meat and the like, but never have it for any kind of shepherds pie, curry, lasagne or the like. Pity it is so cheap really as the others tend to be rather expensive on a gram for gram basis.
Don't like turkey. They are stupid animals in life and no better in death. Will nibble any other commonly nibbled bird really before them.
While I will eat most forms of curry I am not huge on dahl (lentil based). There are some lentil based things I like but not that... think it is the slightly smokey nature of things. Also not huge on many Indian subcontinent pickles and preserves (achaar if you want a term) vs European efforts. Think it is the lime.
Not huge on almonds compared to most other nuts with the obvious exception being marzipan. But more generally will eat cashews by the bag, and you don't want to know what happened to the chocolate covered Brazil nuts. Will often pick out the almonds if throwing some mixed nuts into a cake (though that is more because by the time the pestle and mortar gets to them then everything else is oily dust/paste.
If these is some flavour of spicy then I will eat it -- adore cinnamon (Vietnamese is best), ginger, chillies and the like. Will not thank you at all for mustard (Amercian mustard is not mustard, it is yellow in flavour), horseradish or wasabi.
Think that pretty much covers what not to cook for me.
if you give me pickles on any burger i will shove your foot in your ass
Do Canadians also do the utter heresy that is calling things preserved not in vinegar but in brine as pickles? Can't say I stopped at many burger places in Canada but if it is like the US... I always wondered why people would have a strong dislike of pickles. Had one... just no.
