This recipe is great and very versatile. I've been making a version of this for years, only I use beef cut into stew-sized chunks. Also, I add some peanut butter to taste towards the end. There are many "authentic" Thai variations on red curry, including Panang beef curry. The Panang uses Panang curry paste (Frequently available right next to the tubs or cans of red curry) and peanut butter is part of that curry. Mussuman curry is another variant and it uses potatoes. While Thai beef curries typically don't stew the meat (usually sliced thin and added towards the end) my favorite Thai restaurant from about 25 years ago made their version with beef chunks that were stewed and that's how I've been making it for years. Experiment with any of the 3 red curry pastes: Red, Panang, or Mussuman, and change up the additions to suit your tastes and you can dial this recipe in to suit your exact tastes. Keep in mind that the pre-made curry pastes of any color are concentrated and typically very hot, so plan accordingly. Also, serving this with steamed jasmine rice and making a little extra sauce can really stretch this meal. One last thing, the fish sauce by itself smells and tastes terrible. But it adds a required (and wonderful) flavor to Thai curries and it mellows significantly when cooked. Just don't over do it.