If I had a photo, I would most certainly use it. That is... unless the photo I have sucks. For now, you'll just have to picture a big heaping helping of
Remove husks from tomatillos and rinse well to get off the sticky stuff
Put tomatillos, garlic, peppers and 1/2 the onion on a baking sheet, drizzle lightly with oil and broil about 6 inches away from heat coils until beginning to start to blacken a bit - about 3 minutes
Flip over and repeat, let cool slightly
Put in a processor and whiz until nicely chunky, put in a bowl and add salt to taste, the other half of the onion finely diced and cilantro