What quick longevity meals usually need
Speed alone is not enough. The best fast meals still give you some kind of useful structure, protein, fibre, better fats, or at least enough stability to keep the day from collapsing.
A toast lunch or jar meal can be genuinely useful if the ingredients are doing real work.
Quick morning meals often set up the whole rest of the day.
You do not need endless variety when speed is the priority. You need a few good answers.