I came up with this recipe one night when I wanted to serve tacos and just wasn't in the mood for all the components and their individual bowls or dishes that have to be placed on the table or the island.......nor was I in the mood to clean up all those dishes. So I decided to just put taco ingredients into a casserole and serve it that way. The results were surprising. My family loved the casserole and now they want it served weekly. You can make a few of these ahead and freeze them. If you don't have the freezer space, a big time saver is to purchase ground beef on sale, in bulk and cook & season it all at once. Divide and freeze in 1 pound containers. Makes assembly day a breeze. Just microwave 1 pound of the cooked & seasoned beef for about 1 minute to loosen it up. Then proceed with assembly of the casserole and bake.