North African spices kick up Italian pasta sauce

This image released by Milk Street shows a recipe for harissa-spiced pasta with chicken and green beans. (Milk Street via AP)

This image released by Milk Street shows a recipe for harissa-spiced pasta with chicken and green beans. (Milk Street via AP)

This image released by Milk Street shows a recipe for harissa-spiced pasta with chicken and green beans. (Milk Street via AP)

Many Americans think of only a handful of countries when they hear the word Mediterranean. But that sea is surrounded by a diverse set of peoples and cuisines that have been blending — deliciously — for millennia.