Pre-heat oven to 350 degrees. Chop cauliflower into florets and place it in a casserole dish.
In a separate dish, mix cream cheese together with shredded cheddar cheese and chopped jalapeno, mushrooms, and bacon.
Spoon the cheese mixture onto the cauliflower and mix well.
Coat baking pan with a layer of non-stick spray. Layer the cauliflower mixture and chicken thighs into the baking pan.
Bake for 1 hour or until the cheese has melted, the chicken is cooked, and the top of the casserole is nicely browned.
