We used an assortment of fresh herbs, such as basil, parsley, dill, and cilantro. We suggest making this a day ahead to allow the flavors to fully develop. Store in the refrigerator; stir before serving.
Cook first 2 ingredients in boiling salted water to cover 3 minutes; drain. Plunge into ice water to stop the cooking process; drain.
Process tomatoes, tomatillos, green onions, and next 7 ingredients in a blender until smooth. Pour mixture through a fine wire-mesh strainer into a pitcher, discarding solids. Serve over ice. Garnish, if desired.
*Tequila may be substituted.
Note: We tested with Tabasco Green Pepper Sauce.