What is a good savory vegan snack to make for a group of Buddhists? No onions/garlic of any sort allowed with this type of vegetarianism.

how about a platter of grilled vegetables (eggplant, zucchini, red bell peppers, etc) drizzled with good olive oil, a splash of balsamic, and salt and pepper. brushetta would also be delicious (minus garlic, of course), as would stuffed mushrooms. for a more asian twist, you could do steamed vegetable dumplings.

roasted, seasoned nuts.

Kale Chips with sea salt and a spray of olive oil.

Onigiri, Japanese rice balls with vegan fillings. My roommate in college used to make these for road trips, they were a snack from his childhood and they are great fun to eat. He would wrap them fully in nori and the filling in the center was always a surprise. Many recipes call for salmon or tuna, but he used pickled vegetables, marinated tofu and various sauces.

My raw vegan blue cheese dressing is garlic and onion-free! A yummy and satsifying snack paired with vegetable crudites.

http://verdantkitchen.wordpress.com/2011/02/16/live-streaming-raw-vegan-blue-cheese-dressing-its-easier-than-it-sounds/

Sorry, edit previous response of milk and yogurt. Didn't notice the vegan part. It will still work.

Potato Tikkis would be very satisfying.

Boil potatoes. Add salt, roasted cumin powder and pepper and mash really well. Take lemon sized balls of potato and flatten to 1/2 inch thickness and shallow fry till it browns on either side. Serve with cilantro chutney [cilantro, mint, green chillies,lemon juice,salt, pepper. Blend. Add a dollop of thick yogurt to the chutney if you want creamy.
Serve with hot, sweet milk tea.

I concur with ChezSuzanne's red pepper dip. Mark Bittman has a recipe for a chickpea pizza that is really wonderful and would compliment the red pepper dip or stand on its own.
http://www.nytimes.com/2005/10/19/dining/19mini.html?_r=1

ChezSuzanne's red pepper dip is phenomenal, and I have made it without the creme fraiche (thus vegan) and added extra coconut milk. It is really good served on bread toasts: http://www.food52.com/recipes/8923_roasted_red_pepper_dip_with_cumin_lime_and_coconut_milk

http://iyer-n-chef.blogspot.com/2011/01/venn-polenta.html

This was made keeping in mind a very 'kosher' guideline that a lot of orthodox hindus follow, You may omit the ghee if you want to avoid any dairy.

How about hummus & pita chips omitting the garlic?

http://www.food52.com/recipes/8475_masoor_dal_hummus

http://www.food52.com/recipes/8863_roasted_red_pepper_hummus