Harissa — North African Chili Paste

Harissa is Tunisia's national condiment and one of the most concentrated polyphenol pastes in the Mediterranean kitchen — built on dried chilis, garlic, caraway, coriander, and olive oil in a ratio that's more pharmacological than culinary. A tablespoon goes a long way. It works as a condiment alongside fish or legumes, stirred into soups and stews, spread on bread with labneh, or thinned with olive oil as a marinade.

The variety of dried chili shapes the final flavor: guajillo gives sweetness and mild heat, New Mexico chilis give earthiness, and a few árbol chilis add sharp heat. Using a single variety is fine; using a blend produces more complexity.

Ingredients

• 50g dried chilis (mix of mild and medium-hot — e.g. ancho, guajillo, New Mexico)
• 1 roasted red pepper (jarred), drained
• 4 garlic cloves, minced and rested 10 minutes
• 1 tsp caraway seeds
• 1 tsp coriander seeds
• ½ tsp cumin seeds
• 1 tsp smoked paprika
• 1 tbsp tomato paste
• 2 tbsp fresh lemon juice
• 5 tbsp extra-virgin olive oil
• ½ tsp flaky salt

Method

1. Rehydrate the chilis. Remove stems and seeds from the dried chilis. Cover with boiling water and soak 20 minutes until softened. Drain — reserve soaking liquid.

2. Toast the whole spices. In a dry pan over medium heat, toast caraway, coriander, and cumin seeds for 60–90 seconds until fragrant. Grind in a spice grinder or mortar.

3. Blend the base. In a food processor, combine drained rehydrated chilis, roasted red pepper, rested garlic, ground spices, paprika, tomato paste, and lemon juice. Process until a rough paste forms.

4. Emulsify with oil. With the processor running, drizzle in olive oil. Add a tablespoon of the reserved chili soaking liquid to adjust consistency — harissa should be a thick, spoonable paste.

5. Season. Add salt, taste for heat and acid. The flavor will deepen significantly over the next 24 hours.

6. Store. Pack into a jar, smooth the surface, and cover with a thin layer of olive oil. Keeps refrigerated for 3–4 weeks.

---

What can go wrong: Not removing seeds from the dried chilis produces unpredictable heat — the seeds are where most capsaicin is concentrated. Under-soaking the chilis leaves them leathery and the paste grainy. Skipping the spice-toasting step produces a flat, one-dimensional paste.

Science Notes

Capsaicin — the active compound in chili peppers — activates TRPV1 receptors, temporarily increasing thermogenesis and metabolic rate, and has documented effects on lipid oxidation and platelet aggregation at culinary doses. Caraway and coriander both contain monoterpene compounds (limonene, linalool) with anti-inflammatory activity. The combination of capsaicin, garlic allicin, and olive oil polyphenols in harissa produces a condiment with multiple parallel anti-inflammatory mechanisms — NF-κB inhibition (allicin, capsaicin), COX inhibition (oleocanthal), and antioxidant activity (carotenoids from peppers).

Nutrition Highlights

• Capsaicin: From chili peppers — activates TRPV1; thermogenic; inhibits LDL oxidation at culinary doses
• Allicin: From rested garlic — NF-κB inhibitor; modulates platelet aggregation
• Capsanthin + Lycopene: From roasted pepper and tomato paste — fat-soluble carotenoids; absorption maximized by EVOO
• Oleocanthal: From EVOO — COX inhibitor; synergistic with capsaicin anti-inflammatory effects