Drain the beans well, patting away any excess moisture with absorbent kitchen paper. . Place in a blender or food processor and puree until well blended and smooth.3. ransfer to a bowl and add the garlic, lemon juice, yogurt, oil and parsley.4. Mix well and ason to taste. Cover the mixture and chill for at least 1 hour.5. Serve in a large bowl or on individual plates, garnished with olives, tomato wedges and lettuce leaves.

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