Ingredients

3/4 pound tomatillos, husks removed 

1 jalapeno, stem removed 

1 medium white or red onion, cut into 1 1/4-inch pieces. 

1/2 bunch cilantro, stems removed 

1/2 cup buttermilk 

1/2 peeled avocado 

Coarse salt 

Preparation

In a small saucepan, combine tomatillos, jalapeno, and enough water to cover ingredients by 1 inch. Bring to a boil over medium-high. Reduce to a rapid simmer and cook until vegetables are tender, 7 minutes. With a slotted spoon, transfer to a blender and add onion. Puree until smooth. Add cilantro, buttermilk, and avocado. Season with coarse salt; puree until smooth.