In a mixing bowl, combine the sliced squash, shredded cheese, sour cream, diced tomatoes with green chilies, ground cumin, chili powder, salt, and black pepper.
Transfer the mixture to a baking dish and spread it out evenly.
Bake in the preheated oven for 30 minutes, or until the top is golden and bubbly.
Let it cool for a few minutes before serving. Enjoy!
Notes:
This casserole is great as a main dish or a side. Feel free to add cooked chicken or beef for extra protein.