This is such a great simmer-on-the-stove-on-a-Sunday recipe. Note that when you buy the diced green chiles, they come in mild, medium, and hot. It's probably best to try this the first time using mild chiles as they do vary in heat. You will also get some spiciness from the fresh jalapeños. Make it with or without the optional cream cheese. I like the way it adds thickness, so I always add it. If you do decide to use it, add it a chunk at a time so you can taste it and get the thickness and flavor you want.