Preheat the oven: Set your oven to 375°F (190°C). Lightly grease a 9x13-inch baking dish.
Sauté the aromatics: In a skillet over medium heat, warm the olive oil.
Add the onion with a pinch of salt and cook 3–4 minutes, until soft and fragrant. Stir in the green chiles.
Build the filling: In a large bowl, combine shredded chicken, sautéed onion mixture, black beans, Greek yogurt, 1/2 cup enchilada sauce, 3/4 cup cheese, cumin, chili powder, smoked paprika, garlic powder, and a squeeze of lime. Season with salt and pepper.
Mix until evenly coated but not soupy.
Warm the tortillas: Wrap tortillas in a damp paper towel and microwave 30–45 seconds until pliable. This helps prevent tearing.
Assemble the enchiladas: Spread 1/2 cup enchilada sauce over the bottom of the baking dish. Spoon 1/3–1/2 cup filling down the center of each tortilla.
Roll gently and place seam-side down in the dish.
Sauce and cheese: Pour the remaining enchilada sauce over the rolled tortillas, making sure the edges are coated. Sprinkle the remaining 3/4 cup cheese evenly on top.
Bake: Cover with foil and bake for 15 minutes. Remove foil and bake another 8–10 minutes, until the cheese melts and the edges bubble.
Finish and serve: Let rest 5–10 minutes.
Top with chopped cilantro and another squeeze of lime. Serve with a simple side salad or roasted vegetables.