I grew up in Quarryville, and we still return there about a half dozen times a year to visit my parents.
The best place in town to eat is the Quarryville Family restaurant, a solid greek owned establishment serving diner type food with some Pa dutch additions. .

 
My sister was telling me she loved that restaurant as well, but I haven’t got to hit it yet. I will make her take me next time I’m up, thanks!