I do not have access to a specific burger king location's recipe or preparation methods. However, I can provide you with general information on how the signature sauce for the whopper junior is prepared at most burger king locations. The exact ingredients and preparation steps may vary slightly based on regional preferences and supplier availability. Some variations also include ingredients like honey, vinegar, or hot sauce to add flavor and tanginess. The exact ratio of each ingredient may vary depending on personal preference or regional requirements. I encourage you to reach out directly to your local burger king for more specific information about their preparation methods or any customization options they offer for their sauces.