There are a lot of tire shops and car places on South 12th Avenue, but this is the only one I know of with a taco truck. Los Dos Potrillos serves "la mas rica birria estilo Sonora": fragrant bowls of stewed beef in a spicy red soup.

But they also do a taco dorado ahogado, a fried taco stuffed with shredded beef and potatoes, and then "drowned" with the soup from the birria beef. It's a simple little thing with a nice crunch, despite the sauce. And it only gets crazy when you pour on some of that toasted habanero chile oil from the plastic bottle on the table. I could drink that smokey stuff, but I resisted ... Trying to be classy here. 

Interesting tidbit: The owner Samuel Rubio also owns the car wash next door.   

Location: 3425 S. 12th Ave.  

Phone: 520-203-4603

Hours: 7 a.m. to 3 p.m. every day

Payment: accepts debit and credit

Contact Andi Berlin at aberlin@tucson.com. On Twitter: @AndiBerlin

You can find the Star's digital food writer Andi Berlin at a taqueria near you, taking tiny bites and furiously scribbling into an old notepad.