In a large skillet, cook bacon until crisp over medium heat - drain on paper towels, set aside. Drain the skillet and keep only 1 tablespoon of bacon grease in the skillet. Add the onion and garlic and cook over medium heat for approximately 3 minutes until soft, stirring frequently; season with salt and pepper and add the apple juice and cook until almost all of the juice has evaporated. Remove from the heat and add the bacon, apples, parsley and sage into the onion mixture. Stir well - let cool. In a large mixing bowl add the chicken and panko crumbs - stir in the cooled bacon mixture. Divide mixture into four patties. Grill over medium heat 14 to 18 minutes or until 165 degrees. Serve on toasted buns and top with your favorite condiments