Per person: I cook a head of cabbage, carrots, onions in butter+stock, and one sliced sausage. Several meals worth of tasty vegetables + a small, but sufficient, amount of protein.

Slice zucchini, sauté in butter til tender, then grate Swiss cheese in cream, mix everything in casserole dish. Bake til golden.

Halve a spaghetti squash, remove seeds, fill with small goat cheese mixed with plenty of precooked leafy greens. Top with nuts (I like sunflower, but anything goes) for a bit of crunch. Bake til tender.

But I think I'm missing something here. Just eat vegetables, you'll get plenty of fiber.