Taco Lettuce Cups

1lb ground beef 1oz pkg. taco seasoning 2/3 cup water, if needed L e t t u c e leaves (I used R oma i n e , but butter or Bibb leaves would work well too) S h r e d ded cheddar cheese, tomato, onion, avocado, sour cream or other toppings as desired In large skillet, brown beef until no longer pink.