Ground Beef Taco Casserole Recipe. This comfort food meal is perfect for cold weather in the winter or fall. Need Taco Tuesday or quick weeknight recipes and ideas? This easy healthy and protein packed meal is one of the tastiest casseroles for dinner. Families of adults and kids love this simple meaty main! You'll need ground beef, onion, red bell pepper, garlic, pinto beans, spices, and tomato salsa. Low carb!