Well that is really hard to say. I do my cooking in batches and use my freezer a lot so for me it doesn't take a lot of time. If you have freezer space, I recommend making double batches of things and freezing one.. of course assuming it freezes well.
Buying veggies pre chopped can be a time saver but of course it is more expensive. You aren't going to be eating processed foods so making things essentially from scratch, if you aren't used to it will be more time. If your kids are old enough, get them involved in the preparation.. not only will they enjoy it but you'll have a little elf helping you.
