In a small mixing bowl, COMBINE shredded chicken, sour cream and half of salsa.
SPREAD 1/4 cup salsa on the bottom of a greased 8-insquare baking dish.
LAYER with half of the tortillas and chicken mixture; SPRINKLE with half the tomatoes, minced cilantro and half the cheese.
REPEAT layer with remaining tortillas, chicken mixture, tomatoes and cheese.
BAKE, uncovered, at 400° until bubbly, 20-25 minutes.
SERVE with remaining salsa and, if desired, optional toppings as listed under "Serving Ideas."
SERVE with avocado slices, sliced green onions, fresh cilantro leaves
Per Serving (excluding unknown items): 747 Calories; 37g Fat (44.3% calories from fat); 39g Protein; 64g Carbohydrate; 5g Dietary Fiber; 104mg Cholesterol; 926mg Sodium. Exchanges: 3 1/2 Grain(Starch); 4 Lean Meat; 1 Vegetable; 0 Fruit; 0 Non-Fat Milk; 5 1/2 Fat.