Turn on your oven to 400 degrees. Measure 1 cup of rice and pour the chicken broth into your rice cooker or pan if you are cooking your rice on your stovetop. I like to add butter if I use water only to cook rice. The best ratio for white rice is 2 cups liquid to one cup rice. Cut the chicken breast in half lengthwise to reduce cooking time. Sprinkle salt and pepper to your liking on the chicken. Place cut chicken in a casserole dish then place sliced mushrooms around the chicken. Add 1/4 cup of water to the casserole dish. Next, pour the cream of chicken on top. Be sure to spread the cream of chicken over entire surface. Place dish in oven and cook for about 25 minutes or until the chicken temperature is 165 degrees.