Step 1

In a 3-quart saucepan place chicken in enough water to cover. Bring to boiling; reduce heat. Cover and simmer about 15 minutes or until chicken is no longer pink. Remove chicken from saucepan. When cool enough to handle, use a fork to shred chicken into bite-size pieces. (You should have about 1-1/2 cups.) Set aside.

Step 2

If using fresh spinach, place spinach in a steamer basket over boiling water. Reduce heat. Steam, covered, for 3 to 5 minutes or until tender. (Or, cook in a small amount of boiling water, covered, for 3 to 5 minutes.) Drain well.

Step 3

In a large bowl combine chicken, spinach and green onions; set aside. In a bowl combine sour cream, yogurt, flour, cumin and salt. Stir in milk and chili peppers. Divide sauce in half. Set one portion aside.

Step 4

For filling, combine one portion of the sauce and the chicken-spinach mixture. Divide the filling among the tortillas. Roll up tortillas. Place, seam side down, in an ungreased 2-quart rectangular baking dish.

Step 5

Spoon reserved portion of sauce over tortillas. Bake, uncovered, in a 350 degrees F oven for about 25 minutes or until heated through. Sprinkle with cheese; let stand for 5 minutes. Transfer to a serving platter. To serve, garnish with chopped tomato or salsa and additional green onion, if desired