Yes, you can definitely try other vegetables! Some you can easily substitute but others I would recommend blanching first. Brussels sprouts you can cook from raw or sear it first (check out our Creamy Brussels recipe). When using green beans, broccoli, and cauliflower, I would recommend blanching them first. (Check out the Green Bean Casserole Recipe for blanching instructions. You can check our Broccoli Casserole and Cauliflower Casserole for those instructions as well).