You can add vegetables you might like on pizza as well like mushrooms, peppers, olives. If you are nervous about cooking rice in the crock-pot, you can always cook that on the stove. Just omit that step. Leftover chicken is great shredded the next day in a sandwich bun or over rice or pasta. Don't overcook or your chicken will get dry! When cooked correctly, the chicken should be moist and easy to shred.