Harissa, a spicy North African paste of chiles, garlic, and spices, is available in many large grocery stores and Middle Eastern markets—some brands come in tubes, others are sold in jars. If you can’t find it, though, substitute by mixing together your favorite hot sauce, tomato paste, a pinch or two of ground cumin, and a drizzle of olive oil. Keep playing with the ratios until you have a medium-spicy paste.

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