I freeze a lot of food because it saves me time and money - I grocery shop every two weeks and the fresh produce stays good for months because it's cooked in dishes.
Basically every time I grocery shop, I make a batch of zucchini/turkey meatballs, a batch of squash/chicken nuggets, and 2-3 one pot meals (curry, dal/beans, soup, stew, chili). I typically make marinara sauce, cauliflower/cheese sauce, and some kind of gluten free burrito every month. I also cook veggie/meat burgers, mini pot pies, mini veggie/meatloaves, casseroles, and more.
Burritos, nuggets, meatballs, and any of the "mini" single serving foods can be flash frozen by putting them on a metal cookie sheet to freeze, then transferring to a plastic bag once frozen. That way you can take out what you need and they don't freeze stuck together.
Marinara sauce I freeze in mason jars, but the cauliflower/cheese sauce or other sauces spoon I into ice cube trays and once those are frozen I pop them out and put them into a freezer bag. That way if my child is saying, "I want macaroni and cheese," it takes me no time to boil a single serving of pasta and warm a few cubes of sauce to mix with it.
I started freezer cooking about six years ago because making baby food several times a day is just insane, but also because it gives me ability to feed our household healthy foods at all times. The very first thing I did was make a one pot meal (I believe it was habichuelas guisadas - Puerto Rican style kidney beans in sauce), divided it into four servings and froze it. When I wanted to eat it, I warmed one serving and added rice
which you can also freeze for a homemade, tasty meal in about 5 minutes.