tendency for a material to oppose electron flow and to convert electrical energy into other forms of energy, such as thermal energy and light; measured in ohms. states that the current in a circuit equals the voltage difference divided by the resistance.
This said, harissa or hrissa is often said to be a Tunisian sauce, but it is better described as an ingredient of Tunisian cooking or a seasoning. Harissa is made of red chili, garlic, salt, cumin, coriander, olive oil, and sometimes also caraway or mint. Two Tunisian sauces deserve mentioning: the Kerkennaise sauce and the Mloukhia. The first is made of capers, olive oil, tomato, scallions, coriander, caraway, cumin, parsley, garlic, white vinegar and paprika.
Harissa is most commonly found ready-made in jars, tubes and cans. A spice powder version is also available. Your best bet for finding harissa is Middle Eastern markets, specialty stores and in the ethnic section of most grocery stores.