Cook the rice in plenty of boiling salted water for about 20 minutes. Drain and let it cool down. Coarsely chop the nuts. Wash and halve the tomatoes. Clean, wash and cut lettuce into strips.
Peel garlic and chop very finely. Mix with vinegar, salt, pepper and some sugar. Whip the oil, stir in mayonnaise and sour cream. Mix with the prepared salad ingredients. Minimum.
Leave to soak for 1 hour. Season again.