Remove the husks from one pound of tomatillos, and rinse well. Slice in half. Chop off the ends of the onion, discard it with the outer layer. Roughly chop onion. Slice jalapenos in half and discard seeds (unless you want it spicier).

Toss the tomatillos, onion, and seeded jalapenos in olive oil and salt and place on a large baking sheet.

Turn your broiler on high and broil until the vegetables become charred. (For me this was about 1 minute, then I flipped them over and broiled for 1 more minute). Watch very carefully and make sure not to burn. Remove from oven and let cool.

Add the tomatillos, jalapenos, and the onion to blender along with cilantro, spices, and the juice of one lime and blend on high until smooth (30 seconds to 1 minute).