Beef Taco Filling MRE is a flavorful, hearty entrée that will keep you going during an emergency or on a campout. Beef Taco Filling MRE is a versatile entrée that can be used for more than just tacos. Use it on rice, potatoes, noodles, or on bread. The beef is tender and is dressed in a hearty sauce that reminds you of a Dutch-oven meal. Also works great with other MRE items like MRE Tortillas and MRE crackers.