1. Marinate the lamb pieces in pineapple juice for 24 hours. Dry them well. Brown them in smoking oil with the onion and the concentrate.
2. Add the tomato and the eggplant, then without warming up the pieces, moisten with water and half of the pineapple juice just to cover.
3. Add the spices, cook for 1 hour covered. Remove the meat, blend and strain the sauce, put the meat back in, add the remaining pineapple juice, chickpeas, garlic, coriander, salt, simmer for 5 min.
4. Sauté the small onions in oil with a little sugar. Serve in shallow plates with the onions, drizzle with a little very peppery yogurt.