Deep Dish Taco Bake

1 lb. hamburger, cooked and drained
1 pkg. taco seasoning
2 c. bisquick
1/2 c. water
1 c. sour cream
1 c. shredded cheese
1/4 - 1/2 c. milk

Cook hamburger and add taco seasoning. In seperate bowl combine bisquick and water, mix well. Press bisquick dough in the bottom of a greased 9 x 13 baking dish. Combine sour cream, shredded cheese, and milk. Layer hamburger on top of dough, then top with sour cream mixture. Bake at 375* for 20 - 25 minutes.