Shishitos are awesome. Get a nice cast iron pan, and put it in the oven under the broiler until it heats up. Take your shishitos (tossed in a little bit of olive oil and salt) and pour them into the pan in a single/double layer, and put the pan right underneath the broiler. Give it a few minutes until the peppers are blistered and a little bit blackened, flip them around a bit to get the other sides cooked as well, and then eat! You want to pre-heat the pan in the oven for a while because the goal is to cook them very hot, very fast, so that they blister.
I like to use the bigger Maldon sea salt flakes for that, big crunchy salt is good. You can dip them in anything too and they taste great.