It is sad to say, but our best experience in Belize City was this gas station. We stopped there to get snacks for our drive west and finally found the cheap food and very friendly people that we had been promised.
We found the usual candy bars, chips, and drinks (load up on the water) and also little handmade sandwhiches for $1 each -- very tasty, even though we never found out all the ingredients. The cashier was nice and chatted with us.
Overall, it was a safe-feeling place (not all of Belize City feels like this), and we got some good deals on our road trip food.