Hmmm. I've lived in a tents for months at a time, sometimes by a (relatively, at least) clean stream, and sometimes hauling water in weekly and storing it in 1 to 3 ten gallon construction coolers. Have also lived in in a gutted travel trailer with only a bed, but with a garden hose and an extension cord running from the well pumphouse, and in a cheap motel room.

I don't know whether to assume you are looking for quick recipes for lunch at an office or how to eat half-way well in one or more minimalist circumstances. If the latter, does minimal mean in-doors with electricity and running water, but with perhaps minimal space, a small handwashing sink and no refrigeration?