Tomatillo Salsa

Directions

1. 1
   Cut 2 or 3 thin slices from tip of jalapeno (wear rubber gloves) and reserve for garnish.
2. 2
   In a saucepan simmer tomatillos and remaining jalapeno in water to cover until tomatillos are tender, about 5 minutes, and transfer tomatillos, jalapeno, and 1/4 cup cooking liquid to a blender or food processor.
3. 3
   Blend salsa until chopped but not completely smooth and transfer to a serving bowl.
4. 4
   Cool salsa and chill, covered, until cold.
5. 5
   Salsa may be prepared up to this point 2 days ahead and chilled, covered.
6. 6
   Just before serving, stir coriander, all but 1 teaspoon onion, and salt to taste into salsa.
7. 7
   In a small bowl stir sour cream until smooth and spoon into center of salsa.
8. 8
   Garnish sour cream with coriander sprig, reserved jalapeno, and remaining onion and serve with chips.