Place all of the ingredients except shrimp, cilantro and green onions in a medium pot and bring to a boil over high heat. Reduce the heat to medium-low and simmer, uncovered, for 20 minutes. Strain and return to the pot. Bring to a boil, add the shrimp and cook until the shrimp are firm and pink, 3 to 4 minutes. Stir in the cilantro and green onions, and serve.
Yield: 4 to 6 servings (about 2 quarts)