everything

Hi all -

I'm thinking of trying some bagels this week-end. Here in Omaha our local bagel baker, The Bagel Bin, makes an "everything" bagel with all the toppings. I know there is sesame seed, poppy seed, coarse seal salt and some type of onion and garlic(?) maybe. I've got the seeds and the salts can anyone tell me how to prepare onion and garlic for a topping like this? Maybe dried diced onion and garlic from the seasoning aisle in the grocery story? Thanks for the input!

Trish