In medium saucepan with lid, cook the chicken thighs with taco seasoning and lime juice until heated through; remove from heat onto a platter and shred.
Heat oven to 350.
In a large skillet over medium heat, add olive oil and saute garlic for about a minute.
Add jars of tomatillo sauce, mixing well and heating thoroughly.
Remove from heat; stir in sour cream and one cup of cheese, mixing completely.
Reserve 2 cups of sauce, to pour over top the enchiladas.
Spray your baking dishes with cooking spray, adding 2 tablespoons of sauce to the bottom of each pan, basting to cover the bottom completely, and then spray again over top the sauce.
Add chicken, black beans, chilis, onion, and half of the cilantro into remaining salsa mixture, mixing well.
Add about 2-3 tablespoons of the chicken mixture to the center of each tortilla, rolling until closed, placing the seam-side down in the baking dish.
Continue rolling tortillas until baking dishes are filled.
Cover prepared enchiladas with reserved sauce, ensuring all tortillas are covered with sauce.
Add cheese and remaining cilantro to the top.
Cover with foil, sprayed with cooking spray to prevent sticking.
Bake for about 20 minutes or until heated through with the cheese is melted on top.
Remove foil and bake for an additional 5 minutes to brown a little on top.