Preheat oven to 400. Carefully roll out dough and then place in pie pate that has been sprayed with non stick spray. Press down and crimp edges. Cook crust for 8 minutes
Cook ground beef until done. Drain. Mix in taco seasoning and 3/4 cup water. Let simmer 10 minutes.
Add beef to pie crust. Sprinkle with cheese. Bake an additional 8-12 minutes..
While pie is baking, mix sour cream and taco sauce. Shred lettuce and chop tomatoes.
Remove pie from oven and spread with the sour cream mixture. Let cool 7 minutes. Top with lettuce and tomato.