For the ranch, combine all ingredients in a small food processor or blender. Taste, and season additionally if desired.
For the sub, preheat the broiler. Place the ciabatta cut side up under the broiler for 2-4 minutes until toasted but not charred.
Remove the bread from the oven, and spread on both sides with the ranch. Save any leftovers! Evenly layer the turkey, cheese, onion, and lettuce over the ciabatta, then top with the other half of the bread.
Thread the pickles through toothpicks or bamboo skewers, then skewer the sandwich at about 2-inch increments. Using a sharp or serrated knife, cut in between the skewers to create smaller sandwich sections.
Enjoy!