This easiest 5-ingredient Mexican casserole is perfect for Sunday meal prep. Simply layer whole grain or cauliflower rice, black beans, shredded chicken or lean ground meat, salsa or diced tomatoes, and shredded cheese in a baking dish, then broil until bubbly. It's filling, macro-balanced, and full of flavor, making for a quick meal any day of the week. Add toppings like avocado, shredded lettuce, and Greek yogurt to complete the meal.
