I struggle a lot with baking sourdough bread and usually just cook the sourdough starter itself by frying it in some oil. However, I want to avoid the oil and was thinking if there is any way to cook sourdough starter with just some salt and nothing else (in particular, no oil). I found out that boiling sourdough starter, even after mixing it with some water, is not a good idea because the dough tends to settle down at the bottom and start burning. This gave me the idea that it might be better to indirectly boil it in a hot water bath. Will this give good results? And for this to work well, should I mix some water with the starter? Should I try to minimize the amount of starter I cook at once to avoid uneven cooking?
Cooking the starter in a wet environment will vary based on how wet your starter is and on how dense it is. If it floats, then in theory you could boil it like a bagel, thought it may not have a great crust. At that point you could try baking it to get a more brown crust.
If your starter is more wet and flows, then you could try cooking it in a dry pan. You will need to cook it at a lower temperature since you won't have the oil conducting heat as well. This might be more akin to cooking a tortilla/pita/flat bread of some kind.
Your goal should be to cook it slowly so it sets up and then should release from the pan. Even using a very small amount of oil will help avoid sticking. This will be a lot more challenging with a stainless steel pan. You could also use some parchment paper if you're still struggling with sticking.