Chiles rellenos are a traditional mexican dish made with stuffed and fried roasted poblano chiles that have been covered in a rich salsa roja. This chile relleno casserole takes the classic stuffed chiles and instead layers them in a flavorful casserole with eggs, cheese, and enchilada sauce. Here, the chiles are stuffed with a filling made with chorizo, queso fresco, and fresh oregano. For a vegetarian version, the roasted chiles can instead be stuffed with cubes of colby or monterey jack cheese.