Step #1 Cook chicken in small amount of water, lightly salted, until tender.
Step #2 Bone & cut into pieces.
Step #3 To make a sauce, mix until smooth the following: The 2 cans of soup, can of tomatoes & chilies and chicken broth.
Step #4 Set aside.
Step #5 Into a 2 1/2 quart casserole (greased), 1/2 of the onion, cut into pieces, 1/2 of the tortillas, place a layer of chicken, 1/2 of the cheese & 1/2 of the sauce.
Step #6 Repeat the layers ending with the grated cheese.