Southern Vietnamese food is quite diverse, each of the food vendors/food shops only specializes in one primary dish. So often when you do get a bowl/plate, it's often something that the shop is really good at making. Each of the shops will display what that one item would be in their store front cart.
Here's a lovely bowl of Bun Bo Vien, a sliced beef & beef balls noodle soup.
Night time eating has been so much more delightful when the temperature drops to a bearable state.