I do a big bag of sliced/ chopped onions and put them in the freezer (use folder processor or by hand), doesn't take long to do. Also do same for peppers.
I eat soup for my breakfast most days, I make a large patch for the week. I just put all the ingredients in a pan, bring to boil, cover lower heat, timer on. that's it If I want a creamed soup blitz it with a hand held blitzer while in the pan, or mash with a masher. Put servings into freezer boxes. Very quick and easy.