Yes, it's worth it.
I don't know how much money you can make at higher levels, but I'd think that if you run around the fields with a bazaar filled with food, people will probably buy when they're in need. It saves them from having to run back to the AH.
You should make whatever your culinary level allows you to make. The higher level in the craft you are, the better items you will be able to make. Even if you can't afford to make the best, keep making as much of what you can make. You may not make much money at first, and might even lose some, but once you're higher in craft level it'll be worth it.