Gluttony, Pride, Envy, Lust, Wrath, Sloth and Greed.
Gluttony: maybe a really decadent vegan choc mud cake?
Pride: not sure... possibly something really pretty to look at, with some tentative connection to what you believe in or are proud about
Envy: this one is hard too! I'll think about it
Lust: strawberries and a chocolate fountain, with vegan wine
Wrath: chilli, chilli and more chilli!!! If you wanted to make the food yourself I have a recipe for lumpia (Indonesian mini spring rolls), and you could substitute where my Oma has written "bacon" and put in a vegan substitute. Serve with a nice spicy sambal!
Sloth: BBQ Shapes. Can you get any more lazy than that?
Greed: well... it's your party... so get something really tasty and eat it in front of everyone! Bwahahaha! Then share when everyone is threatening to leave.
The more ideas people throw around the place, the more you'll have to choose from. So help out folks!
cake. Something I've noticed over time! 
