Serrano Chilies in Vinegar Sauce

I was at Bristol Farms a couple of weeks ago and saw that their Serrano chilies looked particularly fresh, so I picked up a bunch. At first, I was going to pickle them in soy sauce, but then I remembered the chilies they serve at Thai restaurants and decided to make those instead. Anyhow, here goes my rendition. I made this over the weekend and did a taste test today and so far, so good.