Authentic chile rellenos are not battered in flour or cornmeal. The only thing that they are dipped in is eggs. I know this because I have watched real mexican cooks make these in guadalajara mexico. They are a bit tiddious to make but I asure you that the outcome will be well worth it. I do not mind the work that goes into it becuase I enjoy the wonderful impression on my guests faces when they take a bite of this authentic dish. You should serve sauce over them as there really is not a chille relleno with out a sauce (you can look up multipurpose tomato sauce for my particular recipe). You can use toothpicks to help keep the chilles closed during frying but make sure to remove them after cooking. A rule of thumb that I use is that I use 1 egg as batter per chile, for example: 6 eggs for 6 chiles. Also make sure to drain fried chiles very well on a paper towel. When buying poblano peppers, try to find wide peppers. Usually these are easier to handle when frying. It is better to buy cheese that you can slice and not shredd as it is easier to stuff and it holds it shape better.