One of my goals in my efforts to teach myself to cook is to have a bunch of "recipes" that aren't recipes at all, but just things I know how to do.
I have made "green salsa" from tomatillos using recipes two or three times. Yesterday, I just threw one together. It was really good. Here's what I did.
1. I cut three or four Anaheim peppers in half, lengthwise, and removed the seeds and white "ribs" - the seeds and ribs have most of the heat. Chiles seem to be named inconsistently: the chiles that supermarkets here call "Anaheim" are 4-6 inches long, pretty narrow in shape, and light green in color. Except for bell peppers, they're the mildest variety I know.
2. I peeled the papery husks off of five or six tomatillos and washed off the sticky gunk that holds the husk on. I cut each one in either two or four chunks to make them approximately the same size.
3. I cut a big tomato into quarters and lackadaisically removed most of the seeds.
4. I tossed the veggies in a bowl with some olive oil and salt to coat, then put them on a parchment-paper-lined baking sheet and then put the sheet in the oven. I was cooking something else at 350 degrees: had I been roasting the veggies by themselves, I would have gone to maybe 400. I roasted them for maybe 20 minutes, then threw some thinly sliced onion on top, then gave it maybe 10 minutes more. The tomatillos need to be soft. Had I been roasting at a higher temperature, I would have wanted some color as well.
5. After letting things cool a bit, I put everything in my food processor and pulverized it, then added a slosh of corn syrup. (Tomatillos are quite acidic. I would have used honey, but couldn't quickly find it.) I think I added some more salt as well, then chilled it.
The result was a lovely light green, and quite flavorful but not at all chile-hot. Next time, I'd leave some of the seeds in. Nonetheless, it was really really good.
Give it a go. Not counting cooking time, I suppose I spent about 15 minutes.