Romantic Dinner Chicken

* 4 skinned and boned chicken breasts
* 1 package (4 oz.) chopped beef
* 1 pint (small) sour cream
* 1 can undiluted mushroom soup
* 3/4 cup butter
* 45 crushed Ritz Crackers

Cover bottom of 8 x 12 dish with broken pieces of beef. Arrange chicken breasts on beef. Mix soup and sour cream and pour over chicken. Melt 3/4 cup oleo and mix with 45 crushed Ritz crackers. Put on top of chicken. Refrigerate. When ready, bake at 275 degrees for 4 hours uncovered. If too brown the last hour, cover with foil.