In a large skillet or nonstick pan, brown the ground beef and break up into very fine pieces. Once all of the moisture has evaporated, add ¼ cup or 1 packet of taco seasoning and ¾ cup of water. Simmer on medium-low uncovered for 15 minutes. Most of the water should evaporate. Turn off the heat and prepare to layer the enchilada casserole.
Layering the Casserole
Pour a thin layer of enchilada sauce on the bottom of the baking dish. Lay down 4 tortillas in a single layer. They will slightly overlap. Pour on more enchilada sauce and spread evenly.
Next, add a layer of the cooked ground beef, shredded cheese, and more enchilada sauce. Repeat the layering process a second time.
Finish the top layer of the enchilada casserole by pouring over the rest of the enchilada sauce and topping it with the remainder of the cheese.
Baking the Enchilada Casserole
Place the casserole in the oven, uncovered and let it cook for 30-35 minutes or until the cheese is completely melted and slightly browned on the edges.
After the cheese has completely melted and the casserole is bubbling, remove it from the oven and allow it to cool for 10-15 minutes before serving.
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Notes
Optional garnishes for serving: sour cream, diced avocado, hot sauce, or fresh cilantro.