I know you asked for items that use existing food crafts, but think of the possibilities you could do with onions...

French Onion Soup (bacon, onion, bread, cheese)
Omlets (bacon, egg, onion, cheese)
Onion Rings (flour, 2x onions in fryer)
Onion Bread (flour, onion in bakery)
Bloomin' Onion (flour, 1x onion in fryer)