Yes, the Grill can be used in the oven as long as the bakelite handle has been removed and with a maximum temperature of 200°C/392°F. The non-stick coating used for the cookware is different from the coating used for bakeware. For this reason, we always recommend to never go above that temperature because the coating could be irrevocably damaged.
We do not recommend to use the bakelite handle to remove the hot Grill from the oven, otherwise, you could compromise the locking mechanism of the handle. We invite you to use heat-resistant holders or wear gloves.