This one may not be to your tastes but Lone Star Tavern in Bellmead has some great chicken fried steak and now serves big O Shiner Bock. Definitely a hole in wall, or more accurately a hole in a couple of double wides.
Vitek's BBQ, Tony De Maria Jr.'s BBQ, Griff's out by China Spring, Coffee Shop Cafe in McGregor and Coffee Station in Crawford are some dang good ones.
"You got anymore questions you wanna ask?"-John Wayne