The phrase "pickle slices" refers to thin, round pieces of pickled cucumbers that are typically used as a topping or condiment in sandwiches, burgers, salads, or dishes. Full definition
Dairy - Free Pepperjack Cheese, a fat round of Roma tomato, a dollop of Vegan Turmeric - Tamari Mayo inspired by the almonds, and a dill pickle slice speared on top. (thebloomingplatter.com)
Topped with pickle slices this is a fantastic replacement for traditional Sloppy Joes. (bembu.com)
He was also famous for his homeade bread and butter pickle slices, the likes of which I never tasted in any jar! (smittenkitchen.com)