Zucchini. One zucchini plant will feed an entire galaxy. At least that's the way it seems to me. Everyone who has a zucchini plant at work brings in truckloads of zucchini they can't use.

Zucchini bread is very very good toasted with butter. Nothing like the vegetable, thank Gods.

I would add to that a tomato plant. Then you could make gazpacho. I don't know what that is, but it's supposed to be good cold in a bowl with salt and pepper and crusty garlic toast.