These are my two cheap eats in Union City.
Cam Huong is a cheap eats Vietnamese sandwich shop place $1.75 for pork combo #1. I usually get that or #4 bbq pork sandwich $2.00. Their chicken sandwiches are good too $2.00. They also have pho, lots of take-out dishes. Cash only.
32124 Alvarado Blvd, UC 510-441-0590
I asked one of the ladies there and she says her cousin owns Cam Huong in Oakland. 920 Webster St, Oakland. 510-444-8800.
Soon Kee Restaurant, Chinese-Vietnamese food. it's a couple doors down from Cam Huong, across from Taco Bell. cheap and good food. Ben always get some type of pho, and I get potstickers or the fresh Vietnamese egg rolls w/ peanut sauce, claypot w/ catfish comes w/ a small bowl of soup and rice. Two can eat for $20 or less. Credit credit ok if more than $15 I think.