Throw it all in a pot, cook on high until boiling, turn down and simmer for about 1-2 hours, serve. Vegan Christmas dinners should not be totally wrapped up in replicating non-vegan dishes since there are so many original vegan dishes that can stand on their own merits and provide an unforgettable dinner experience that will be talked about for many Christmases to come. The possibilities are unlimited as vegans embark on their own plant-based concoctions and creations.