Place Chicken in large saucepan and cover with water.
Sprinkle in a handful of oregano,add garlic powder and salt.
Boil about 20 minutes and shred from bones.
Save broth.
Mix soups, sour cream & chiles in large pan.
Add only enough broth to slightly thin.
Re-season as needed.
Simmer on low 15 minutes.
Add chicken and diced onion.
In casserole dish, arrange 6 Tortillas flat across bottom, spoon in 1/2 the sauce, sprinkle 1/2 the cheese.
Repeat- Tortillas, sauce and cheese.
Bake in 350 degree oven for 20 minutes.
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