Pesto Chicken on Ciabatta

Whole Wheat Ciabatta (Unbleached Untreated Whole Wheat Flour (Wheat Flour, Niacin, Reduced Iron, Thiamine Mononitrate, Riboflavin, Folic Acid), Water, Sea Salt, Yeast, Malted Barley), Chicken Breast, Mayonnaise (Soybean Oil, Water, Whole Eggs and Egg Yolks, Distilled Vinegar, Salt, Sugar, Lemon Juice Concentrate, Calcium Disodium EDTA (Used to Protect Quality), Natural Flavors), Provolone Cheese (Pasteurized Milk, Cheese Culture, Salt, Enzymes), Red Bell Peppers, Onions, Soybean Oil, Olive Pomace Oil, Lemon Juice, Balsamic Vinegar (Wine Vinegar (sulfites), Concentrated Grape Must, Caramel Color), Arugula, Basil, Parsley, Parmesan Cheese (Pasteurized Part-Skim Milk, Cheese Culture, Salt, Enzymes, Potato Starch, Powdered Cellulose added to prevent caking), Dill, Kosher Salt, Garlic, Ground Black Pepper, Rosemary