Saute the onions, garlic, and chiles in the oil untile the onions turn golden, approx 10 min.
Dissolve the tamarind concentrate in the hot water. Puree the onion mixture, tamarind liquid, and all theremaining ingredients except the chick peas in a blender until quite smooth.
Pour puree into nonreactive saucepan. Add the chick peas and simmer, uncovered, for 20-30 min. until the sauce becomes dark and thick.
Serve hot or at room temperature.
Serves:6 ` ` Total cook time:40 min.
Source: Sundays at Moosewood Restaurant