We didn’t learn to make locro de papa at our cooking class, but I had to try it at home as the climate here makes one want soup and the versions I had at restaurants were yummy. I used a recipe from a website (see below) and was happy enough with the results to cook it every week after. Of course, we ate it with picadito, which really does make everything taste better.
https://www.laylita.com/recipes/locro-de-papa-creamy-potato-soup-with-cheese