It can be a rewarding but challenging path. Vegans need to supplement their diets with vitamin B12 or risk deficiency. Supplements are the easiest way to do this, but they can use fortified foods, like breakfast cereals, soy milks and vegetarian burgers, as well. If you are cooking for a mixed crowd, Havala says, it makes sense to choose vegan foods because everyone can eat them. Unless you point it out, people aren't likely to notice that the foods contain no animal products, particularly if they are well-prepared and presented nicely.
People respond to good food, period.