With the rack in the top third, preheat the oven to broil. Line a baking sheet with foil.
Place the tomatillos, green onions and jalapeño on the baking sheet. Oil and season with salt.
Broil for 8 to 10 minutes or until the vegetables are slightly charred. Let cool.
In a food processor, finely chop the green onions and jalapeño. Add the tomatillos and blend until chopped. Add the avocados and purée until smooth. Add the cilantro, lime juice and cumin. Blend just until the cilantro is chopped. Adjust the seasoning. Transfer to a bowl.
Serve cold with corn chips. Delicious with tacos or fajitas.
Note
If using fresh tomatillos, remove the papery husk that covers them. Wash under warm water to remove any sticky residue. Cut into quarters.
Chef’s tip: Somewhere between a tomato and a ground cherry in appearance, tomatillos bring a freshness to this guacamole.