Low-fat baked taco shells with delicious beef filling
Of course you may use store-bought crispy taco shells, or even flour tortillas for soft tacos, which would be safer if you have small children. Choking Ahogo!
Also, you will probably have enough beef mixture for 10 tacos, actually, but 8 is how many tortillas will fit easily in most ovens. You could of course bake more in cycles. Or use leftover taco filling for a taco salad the next day.