add fat to everything. cook up veggies in lard. make blue cheese dressing for your salads (or any dressing that uses mayo, and make home made mayo as it tastes better and is better for everyone). add butter, coconut oil, or olive oil whenever you can.
if the meals are higher in fat, you'll be more satisfied. we can buy rendered duck fat, beef tallow, pork lard, pretty easily and pretty cheap. we also save bacon drippings after frying up bacon, so we are good there.
buy in bulk when you can. we bought lots and lots of kilos of chicken when our supplier went out of business, and also a fair number of turkeys at the end of the season (though they are lower quality -- not organic, but free range, and i'm not sure if they are grain finished or not). a big freezer helps, and hitting whatever sales you can.
joining a community garden and growing as many of veggies as you can helps too. you'll want to freeze and can some of those as well, obviously, and if possible, get the kids involved in growing.