20 minutes of prep then 15 minutes in the oven to finish makes this an easy week-night (or any night) dinner. You could use all spinach and skip the pumpkin
I use the goat cheese that comes in the small, square containers. Any herbed cheese (Boursin) would also work. Use cooked pumpkin, butternut squash or all spinach.
Keywords: chicken casserole, chicken rice, spinach gratin