“Well-stocked pantry” is a bit vague, IMO, but probably stuffed peppers. Filling would be barley and some kinds of beans or lentils, in a tomato sauce (ideally I also have some balsamic vinegar to add to the sauce), which seems safe to assume for a well stocked pantry. Ideally I’d be able to add some rehydrated dried mushrooms and chopped walnuts as a faux ‘ground beef,’ add appropriate Italian seasonings, then top with a vegan parm (almond flour + garlic powder + nutritional yeast are pantry staples for me, at least), some salt and pepper, and a drizzle of EVOO.