We seem to get excesses of things at various times so freezers are often full to bursting.
Tomatoes, whole. they separate on defrosting, the skins and core slip off easily and then you can whooshe it about and use in sauces, soups etc.
Basil - I freeze masses of pesto when the basil all comes up at once. We also have loads of walnuts every year so these go into pesto too.
I make up quiche mixes with excess eggs, or creme caramel and freeze, and pastry cases separately.
Courgettes, Jerusalem artichokes, onions, carrots all go into soups.
I don't like frozen potatoes or whole cauliflower, but I have just found recipes for cauliflower puree that freezes well, also cauliflower and blue cheese soup, and cauliflower curry.
Red and green peppers, chillies, ginger, all get cleaned and thrown in raw. They come out a bit soggy but absolutely fine in casseroles and sauces. Aubergines I slice and par roast with a sprinkle of olive oil then open freeze, good for casseroles and moussaka.
Spend my summer slaving over a hot stove processing what we call NFB - Nature's F-----g Bounty! love it and eat well and cheaply in the winter.