Nella, yes you can! and its worth the upfront time and effort! I do do exactly what Schmoodle does!
I Will buy bulk meats (on sale, at BJs/Sams) section them into dinners and add marinades, and freeze them -- I will keep some whole and others I would cube for easy stir fries or as protein adds to soup... (chick, pork,ham, beef) by adding a marinade up front, the meat takes the flavoring up as it freezes and unfreezes. And once you cook the whole batch you can refreeze the meat if you wish (I do find that the longer it stays in the freezer the less taste there is though...just from my experience

)
I will buy a batch of beans, steam them/season and freeze... String beans,snap peas , brocoli, soy beans --they all freeze nicely....but personally I buy alot of frozen veggies,that yes I cook then refreeze... I do Cauliflower in cheese sauce (see Weezles cheese recipe), --seems whenever you freeze stuff with a cheese base, I need to add more milk when I thaw and reheat it
I agree with Shmoodle, Potatoes get a bit wonky ...

--- and dont even attempt rice...lest you want muck and a tile grouting substitute.
I like to make alot of Asian type of dishes, with frozen veggies, and supplement with the frozen chunked meat.
Schmoodle is definitely the "freezerQueen"

in my book! I buy strawberries and blueberries already frozen.. She's right - Frozen berries are ESSENTIAL to a good smoothie!
Sometimes its trial and error with your own freezer too... believe it or not! Its definitely worth the upfront work though! Good luck!