I need this thread. I have ADD as well and it's too overwhelming. I've just made myself turkey dinosaurs and oven chips, and I eat that kind of thing too often. It's better than it used to be as I used to literally live off biscuits for days on end. Low blood sugar doesn't really help the other symptoms because you end up with even less energy.
I find jars of sauce are an easy fix and buying chicken which is already cut into tiny pieces. That's not too bad. It's all the chopping I really hate. There was a thread on here not long ago about frozen shortcut food which is alright. I would put in a vote for Bird's Eye Steam Fresh veg packs - they aren't soggy like frozen veg usually is, and they don't go off.
Those instant ramen packets, combined with a mini stir fry - I use mushrooms, onions, random veg that we have plus small pieces of meat if I have some (raw or cooked) and season with soy sauce, ginger and black pepper then use the sauce from the noodles to thicken up and make a nice sauce.
Easy pasta is great too. I cook the pasta and at the same time in a frying pan cook things like bacon, mushrooms, courgette, garlic, any random veg. Just whatever I have available. I like strong flavours so I keep in little jars of chilli, olives and also capers. When pasta is almost cooked add either tinned tomatoes or cream (if I have either) to frying pan and thicken. Drain pasta, possibly coat in butter or pesto to prevent sticking, and then combine with pan ingredients either in the pan itself if it's a sauce type thing or in the bowl if I've done pesto. You can use a splash of pasta water to loosen the sauce. When cooking the pasta in the sauce you want it to start to look "glossy" as that means it's done.
Having a slow cooker helps because I can do it in the morning (as long as I remember) where there is no time pressure and I'm not tired and hungry at the same time. Plus it makes loads so I freeze individual portions as leftovers.
Cold dinners so crackers/ryvita plus ham, salami, chopped up salad veg, crisps.
I hate having to eat so often, I get really frustrated about it. I find it helps to have extremely limited options for breakfast (I eat weetabix, a yoghurt, museli or porridge and that's it), slightly expanded options for lunch and then the most variety for dinner as that gives me less to think about but it's not boring either, because if I find something dull I just won't bother to eat it at all.
I also do let myself have convenience food fairly often. I agree with Aldi - they do some really nice frozen meals which are OK.