I used frozen broccoli as suggested. At 25 minutes the broccoli was still hard and the casserole was kinda wet, didn't taste done at all. Kept cooking the casserole, checking on it every 10 or so minutes, it took approx an additional 35 minutes for broccoli to soften and the entire casserole to taste done. It is delicious, but it took about an hour cooking at 425 degrees to get that way.