Every meal you can make it a vegan one. However if vegan is not a choice you can go for a vegetarian option. However with family meals that you would normally make vegetarian, try and make at least 2-3 of them vegan to share with the family the yummy foods that being Vegan has to offer. You never know within no time your family might be okay with even more vegan meals.
My general outline I use for this diet is as follows:
All personal meals(e.g. Lunches, snakes) are vegan;
Dinners with the wife are 2-3 vegan 4-5 vegetarian;
Dinners with in-laws/friends vegetarian (vegan if an option)
Please think of your family when you do this, Guys that means don't make your wife learn to cook vegan. If you want a vegan dinner make it for your wife and yourself. Your wife will love Vegan food even more when you make her a home made Vegan meal!