Very easy and delicious. I used a mix of whole wheat and pumpernickle bread slices and added a bit of rosemary and garlic. Could not find Fontina in the store, so I subbed Baby Swiss. We had this for dinner with roasted beets and a big salad with goat cheese and pine nuts added for a bit more protein.
This is my go-to brunch standby. Total crowd pleaser every time I bring it to an event - very easy to make, I use the rustric whole grain bread from Costco and it stands up well to the soupy mixture. If you like savory this is your recipe!