i'm with expatty: ya gotta have the onions and sour cream!
i also like to use cubed lamb (not ground) in my chilli. it gives it a more meaty flavor, imo.
larry, since you're a vegetarian, i guess you don't need meat suggestions. but, how about adding a diced fennel bulb to substitute for some or all of the onion, or fennel stalks for some/all of the celery?
i love fennel. it's another one of those background flavor dealios.
A true lover of nature does not despair now that his mistress has turned a colder cheek.