Yes, you can put a glass dish in a toaster oven. Glass is a heat-resistant material that can withstand high temperatures, so it won't shatter or break when placed in a toaster oven. However, it's important to use caution when handling hot glass, as it can cause burns. When placing a glass dish in a toaster oven, be sure to use an oven mitt or pot holder to avoid coming into contact with the hot surface.