Mexican Enchilada Casserole

Preheat oven to 425 degrees F (220 degrees C). Spray a 3-quart casserole dish with cooking spray.

Combine tomato sauce with chili powder and 1/2 cup water or as desired in a small saucepan over medium heat; bring to a simmer and stir to make a pourable sauce. Remove from heat and set enchilada sauce aside.

Cook and stir ground turkey, onion, and 1 envelope of taco seasoning mix in a large skillet over medium heat, chopping turkey as you cook, until meat is crumbly and no longer pink, about 10 minutes. Stir in 2/3 cup water and remaining envelope of taco seasoning mix and cook, stirring often, until moisture has evaporated from turkey mixture. Mix 1 cup of enchilada sauce into turkey mixture and remove skillet from heat.