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Quiche!

While I don't have any specific recipes (I usually just wing it), one could stuff peppers, zucchini, eggplant, acorn squash, tomatoes, sweet onions, etc, with pretty much anything (meat, rice/grains, more veg, herb, cheese, etc.) and roast them in the oven. Search the internet or, really, just throw some semi-cooked stuff into a halved veggie and roast them together. I say semi-cooked, because ground meats overcook so easily, and you end up with cardboard.

The vegetables aren't roasted, but maybe shepherd's pie will fit the bill? https://food52.com/recipes/33318-scrummy-shepherd-s-pie