1 med. to sm. onion
3 c. chopped cooked chicken
1 box taco dinner mix (shells included)
1/2 c. sour cream
2 c. shredded Cheddar cheese
Shredded lettuce
Chopped tomato

Brown chicken and onion in pan. Add package of taco seasonings from box. Add 3/4 to 1 cup water. Stir and simmer 10 minutes. Add sour cream and cheese. Stir until cheese melts, approximately 5 minutes. Fill taco shells with chicken mixture, top with lettuce and tomato.