Add the crumbles, taco seasoning, and water to a medium microwave-safe bowl and stir to combine.
Cover with plastic wrap and heat on high power until just bubbling, about 1 minute. Or cook covered in a non-stick skillet over medium-low heat on the stove.
Stir mixture, spoon into shells, top with cheese, lettuce, tomatoes, optional sour cream, hot sauce, or your favorite taco toppings. Tacos are best enjoyed warm and fresh.
