Place the chicken breasts in the bottom of the slow cooker and pour of the Italian dressing over the top. Place the brick of cream cheese on top and sprinkle with 1/4 cup of the parmesan cheese, salt, and pepper. Cook on high for 4-6 hours. 30 minutes before serving, shred the chicken and prepare the pasta and broccoli according to package directions. Mix the pasta and broccoli into the chicken and sauce mixture. Top with remaining parmesan cheese and serve. Delicious with a Cesar salad and French bread.