Chile Verde is a green, tangy tomatillo-based salsa or sauce. While you can certainly use the sauce for dipping chips or chilaquiles, I love simmering chicken or pork in the sauce for a quick weeknight stew. I love the addition of jalapeno to the sauce, but it can be omitted if your prefer your food less spicy.
(You can also ramp up the heat by using additional peppers or adding a few dashes of red pepper flakes or chipotle powder.)
There is no need to add a thickener to the salsa — the tomatillos have lots of pectin to do the job.