Preparation Place tamarind in metal bowl; add enough boiling water to cover. Let stand 15 minutes to soften. Drain. Press pulp through sieve, reserving 3 tablespoons strained pulp. Using scissors, cut shell of each shrimp all the way to tail end, exposing vein. Remove vein. Loosen shrimp shells but do not remove. Mix shallots and garlic in small bowl; set aside 1 tablespoon shallot mixture. Tuck remaining shallot mixture under shrimp shells. Mix 3 tablespoons tamarind, broth, fish sauce, wine, and sugar in small bowl. Heat oil in heavy large skillet over high heat. Add reserved 1 tablespoon shallot mixture and onion wedges and sauté 1 minute. Add shrimp and sauté 1 minute. Add tamarind mixture and sauté until shrimp are opaque in center and sauce coats shrimp thickly, about 3 minutes longer. Mix in green onions and chile. Transfer to platter. Sprinkle with cilantro and serve. *Available at Asian markets.
Preparation Place tamarind in metal bowl; add enough boiling water to cover. Let stand 15 minutes to soften. Drain. Press pulp through sieve, reserving 3 tablespoons strained pulp. Using scissors, cut shell of each shrimp all the way to tail end, exposing vein. Remove vein. Loosen shrimp shells but do not remove. Mix shallots and garlic in small bowl; set aside 1 tablespoon shallot mixture. Tuck remaining shallot mixture under shrimp shells. Mix 3 tablespoons tamarind, broth, fish sauce, wine, and sugar in small bowl. Heat oil in heavy large skillet over high heat. Add reserved 1 tablespoon shallot mixture and onion wedges and sauté 1 minute. Add shrimp and sauté 1 minute. Add tamarind mixture and sauté until shrimp are opaque in center and sauce coats shrimp thickly, about 3 minutes longer. Mix in green onions and chile. Transfer to platter. Sprinkle with cilantro and serve. *Available at Asian markets.