I've made this many times usually with Jimmy Dean sausage (any variety) as we eat it for breakfast. It's also good with fresh red or green peppers as an alternative. Sometimes I cut 8 oz cream cheese and throw it on the top. There's nothing you can do to mess this up - it's always great!
My DD and I enjoyed this awsome make-ahead dish for our breakfast when she came for a mother-daughter sleep over. I made it the night before so that we could both be lazy, sitting around and relaxing together. I made only a couple of changes to the original recipe, substituting fresh bell peppers for the roasted ones, sauteeing them with the other vegetables, including some mushrooms. I also used some home made herb bread because I didn't have any Italian bread, and think it added yet another layer of flavor. You can bet I will be making this recipe again!