Chicken Mushroom Casserole Recipe Type: Entree Serves: 8 Ingredients 4 tablespoons butter, divided 8 (5 oz) chicken breast halves 1 shallot, finely chopped 2 garlic cloves, minced 1 pound small button mushrooms, halved 1/4 cup sherry 2 tablespoons flour 2 (14 oz) cans low sodium chicken broth 1 (6 oz) box long-grain wild rice