Cook chicken and pasta thoroughly. You can use leftover chicken if it's available. One night I cook a whole chicken for supper and we eat half for supper and then I will make this the next night and my family has no idea it's from leftovers!!
In a 9x13 cake pan mix shredded chicken, pasta, ranch, chopped pepper&onions together. Top with mozzarella. You can add more if you want. Bake at 350 for 35 min or until done.