Skip the steps involved in classic enchiladas by combining all of the ingredients in a single skillet. To make the dish even more weeknight friendly, everything comes together on the stovetop with a quick finish under the broiler to get a crisp, cheesy topping.
Enchilada sauce - Heat oil (the portion for the sauce) in a saucepan over medium heat. To the hot oil, add chili powder, cumin and oregano and saute until fragrant, ~1 minute. Add tomato paste and stir to combine. Whisk in stock and bring to a simmer. Simmer until sauce thickens slightly, ~5 minutes. Season with salt and pepper. (Can be done 5 days ahead)
Onions / Tortillas - Prep as directed. (Can be done up to 5 days ahead)
Kale - Discard stems and finely chop leaves. (Can be done up to 4 days ahead)
Chicken - Chop into bite-sized pieces, season with salt and pepper and tenderize with a fork.
Heat large oven-safe skillet over medium-high heat. Add first part of oil. To hot oil, add chicken and saute until chicken is golden brown and cooked through, ~4 minutes. Set aside and return skillet to heat.
Add second part of oil to skillet. To hot oil, add onions and kale. Saute until both onions and kale are very tender. Add enchilada sauce, chopped tortillas, beans, chicken and half the cheese to the skillet. Gently stir to combine. Top with remaining half the cheese.
Place skillet under the broiler and cook until cheese is melted and sauce is bubbling, ~3 minutes (watch it closely to prevent burning).
Divide enchiladas between serving bowls and top with sour cream and cilantro. Enjoy!