Heat oven to 400°. In large bowl stir together chicken, 1 cup cheese, sour cream, chillies and cumin.
Pour 1 cup salsa into 10 inch pie pan. Lay 1 tortilla in salsa, coating one side lightly. Place tortilla, salsa side down, in 2 quart greased souffle dish or straight sided round deep casserole. Spread 1/2 cup chicken mixture on top of tortilla. Repeat with 3 tortillas and chicken mixture. Spread with 1/2 cup salsa. Continue layering tortillas and chicken mixture ending with tortilla. Top with any remaining salsa and remaining 1/2 cup cheese. Cover; bake for 35 to 40 minutes or until heated through.
