Cover dish with foil and bake for 25 minutes; remove foil and continue to bake until cheese is brown and bubbly.
If you follow this recipe exactly, you get a reeealllly cheesy casserole. Though many of you may love that, it was a bit too cheesy for me, so when I make this, I either double the amount of cauliflower used (ie 2 heads instead of 1) or I just half the amount of cheese for 1 head of cauliflower.
Actually, I've found that reducing the cream cheese to 6 oz and each of the shredded cheeses to 6 oz is just perfect for us! But really, any way you make it, it's a keeper!