Preheat oven to 350 degrees. Spray a 9x13 baking dish with nonstick spray.
If using frozen cauliflower rice, steam according to instructions on bag. If using fresh cauliflower rice, add to a microwave safe bowl along with 1 tablespoon of water. Cover tightly with plastic wrap and microwave for 4 minutes.
Add green beans to a large microwave safe bowl along with 1 tablespoon of water. Cover tightly with plastic wrap and microwave for 3 minutes. Drain.
Add the cooked cauliflower rice and green beans to a large mixing bowl along with the turkey, cream cheese, garlic, 2 1/2 cups of cheddar, eggs, and spices. Stir well to combine.
Spread mixture into the prepared baking dish and sprinkle the top with remaining 1/2 cup cheese.
Bake uncovered for 30 minutes.
Notes
For the cauliflower rice, this dish is made extra easy by using the frozen 'steam in bag' cauliflower rice you find in the freezer section. For the green beans, you could also use the 'steam in bag' frozen green beans rather than fresh. Alternately, canned green beans will work fine, but do not cook them before adding to the casserole.