Hi GB, when I lived overseas there really wasn't much in the pre-prepared foods aisle at the supermarket, and I worked full time with three little girls. I used to come home and drop my bags and go straight into the kitchen and try to get dinner on the table as quickly as possible. I made up some dishes that could maybe work for you....I really liked purrfectlydivine's idea for making a "hamburger helper" mix!
My ideas are not original - I see variations all over this post!
Essentially, I'd brown mince meat (steak mince usually (hamburger)), add seasonings (worcestershire sauce, beef broth, salt, pepper, garlic -- whatever strikes your fancy), frozen veggies, raw rice and liquid, then leave to simmer for 1/2 hour or so. My mom calls dishes like this "Hot Pot". They are filling, quick and cheap and can be done in one pot.
This works nicely with chicken: brown the chicken as you would the minced meat, then, throw in some rice, garlic powder maybe (fresh is nicer of course, but to save time I guess you'd use the packaged stuff....), a packet of Goya chicken boullion & water, or some nice pre-packaged chicken broth, frozen broccoli florets......and Bob's your uncle, you have a nice meal.
I cooked for my girls right from the get-go - pre-packaged baby foods were prohibitively expensive. I'd do a squash or something in one pot, then mash it. They ate very very well.
Good Luck finding the right 'mix' for you - even today I'm still working full time, the girls are 21, 19 and 17 and my husband comes in starving every night and it's still a challenge - although these days they do pitch in.