We all recognize the boxy, hard plastic nut containers with jug-like handles, filled with 40 ounces of cashews in various iterations: roasted, sea salt, unsalted, organic, and more. Those are ...

The Accra street vendor looks at me, bemused. I'm trying to establish how the rather flimsy 30g bag of roasted cashew nuts she's selling, beside a sweltering highway in Ghana's capital ...