Brush or smear the chicken with butter. Brown it under the broiler, skin side up, just until browned; don't cook it through. Put in a deep baking dish that has a lid, skin side down. Dot with a little more butter, and sprinkle with salt and plenty of pepper. Cover all the chicken completely with the onions. There should be plenty!
Bake in a 325 degree F oven for 1 3/4 to 2 hours.
You'll have really tender, flavorful chicken and the best gravy!
Source: "The Penny Pincher's Cookbook" by Sophie Leavitt
By Free2B from North Royalton, OH
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Place thawed chicken breasts in a 9x13-inch casserole. Stir soup in can, then spread over chicken. Sprinkle mushrooms and cheese over chicken.