Okay, I will admit it, I tend to spend most of my lunches at Mimosa, 88 Bui Vien Street (Pham Ngu Lao) for the last 5 years. I have known some of the wait staff and chef for a really long time now. The chef is one of the best in the backpacker area in my opinion. He is really good at Tex-Mex dishes such as my favorite below:
(Something similar to enchiladas)