Preheat your oven to 375 F/190C. This is the ideal temperature for baking the casserole to perfection.
Spray a 9" x 12" x 3" casserole dish with non-stick spray. It's essential to use a dish of this size to hold all the delicious layers.
Take the frozen cauliflower rice out of the freezer and let it sit at room temperature to start thawing.
In a small saucepan, pour in the Hatch Green Chile Enchilada Sauce (or any sauce of your choice) and simmer it until it reduces to one cup.
While that’s cooking, dice the onion and green bell pepper. Slice the green onions as well.
Next, cut the cooked chicken into small dice. I often use rotisserie chicken from Costco to save time, and it works perfectly.
Heat olive oil in a large frying pan. Once hot, add the diced onion and green pepper. Sauté until they start to brown, about five minutes.
Add the ground cumin to the pan and cook for a few more minutes until fragrant.
Now, add the thawed cauliflower rice to the pan, cooking over high heat until hot and any excess liquid has evaporated, around four minutes.
Once the Hatch Green Chile Enchilada Sauce has reduced, transfer it to a large bowl. Add the diced chiles and taste, adjusting spice levels with the optional Green Tabasco Sauce if desired.
Allow the mixture to cool slightly before stirring in the sour cream, diced chiles, and sliced green onions.
Start layering! First, spread half of the cauliflower rice mixture in the bottom of the prepared casserole dish.
Next, add half of the chicken and sour cream mixture by spoonfuls, spreading it evenly over the rice.
Sprinkle half of the Mexican Cheese Blend over the top of the chicken mixture.
Repeat the layering process: another half of the cauliflower rice mixture, followed by the remaining chicken mixture, and finish with the final layer of cheese.
Place the casserole in your preheated oven and bake uncovered for 30 to 35 minutes, or until it's bubbling hot and the top is beautifully browned.
Once done, let it sit for five to ten minutes before cutting into it. This will help the layers set and make serving easier.
Enjoy your delicious Layered Mexican Casserole!