Micheline,
It sounds like you were served a classic creamy polenta. I would start with a classic "stir" recipe (rather than baked). I like the combo of whole milk and stock in savory polenta recipes better than either all stock or all dairy.
By chance, does the restaurant where you ate this polenta have their menu online? I'd like to see the description of their polenta. That would give some clues onto how to prepare a close version at home.
Once you have a basic creamy polenta recipe, you can add your green chilis, etc. Did this dish have cheese? Probably so, since that would pair nicely with the green chilis.
Andiesenji, I love your idea of using the different textures of polenta -- and you can't go wrong with Bob's Red Mill, huh??!!! Most of the time I cool mine in the pan, then slice and fry. However, the best polenta I ever ate in my life was in a restaurant in West L.A. and it was served as a side to veal shanks. Like Micheline, I was smitten
There's something about creamy polenta right from the pot... on a cold night.... So, call it corn meal mush, but it's still good savory eats!
Marlene