In many North African countries, harissa is as common as olive oil is in
Italian restaurants. In the U.S.,
harissa (sometimes called harissa paste) is widely available on the Internet
but not necessarily found at supermarkets.
Tubes of harissa paste can cost as little as $5.
That little tube
could last for a year or, if you are a spicy food fanatic, it could be squeezed
out in a week. I shook a few drops of
harissa onto leftover mashed potatoes the other evening, and it added an
interesting dab of flavor.