If you go to Mobile   for a day trip----treat yourselves----go to The Yen, authentic Vietnamese food, at 763 Holcombe Ave. A family run business with fantastic and very reasonabley priced food. Whenever I go, I get two carry-outs for the next day at home. They are closed on Mondays. Open for lunch and dinner, phone 251-478-5814.
I try to order something I have never had each time I go. Never disappointed. I especially liked the Vernicelli Combination dinner with pork, Banh Xeo, a pork and shrimp crepe with coconut, beansprouts, onions, & cilantro ($5.75), and the rare beef and calamari w/ lemon juice and ginger appetizer salad. The Tofu and vegestables in curry dish that I expected to be spicey hot, was not. (I like hot)-- The shrimp wrapped sugar cane and the crab claws wrapped inmeat are recommended.  Do not leave without the home made sweet lemon yogurt...it comes in a plastic cup with lid, so you can easily take home what you don't finish. Off I-10, you can go north on Duval St (Dauphin Island Pkwy exit) almost straight to it--see Mobile map here. The Mobile Bay Monthly in July 1998 called The Yen "Mobile's Best Kept Secret"