Cook the pasta according to the package directions. Drain and set aside. In a large skillet, heat the olive oil and cook the onion until tender. Add the garlic and red pepper and cook a few minutes more.
Add the shredded chicken, green chilis, cumin, chili powder, salt and enchilada sauce until heated through. Add the pasta to the sauce. Stir in cheese until melted and sour cream right before serving. Add your favorite toppings and enjoy!