**Prep the Vegetables:** Peel and dice the sweet potatoes, partially cook them on a baking sheet, chop the remaining vegetables, and rinse the black beans.
**Make the Sauce:** A vegetable-filled tomato sauce binds this casserole, enhancing its fiber and micronutrient content.
**Layer the Casserole:** Once the chicken is shredded, sweet potatoes are partially cooked, black beans are strained, and the sauce is prepared, start building the casserole. Fill a prepared baking dish with alternating layers of tortillas, sweet potatoes, black beans, and sauce, followed by tortillas, chicken, and sauce until all ingredients are used, filling the casserole dish.
**Bake the Casserole:** Transfer the prepared casserole to the oven for baking.
**Sprinkle with Cheese:** Just before the casserole is ready, remove it from the oven and cover the top with shredded Monterey Jack or Havarti cheese. Alternatively, sharp cheddar cheese can be used if preferred.
**Bake Again:** Return the casserole to the oven and bake until the cheese melts and the top turns golden brown.
