Subway Sweet Onion Sauce Recipe

1. In a saucepan, combine the sugar and water. Heat over medium heat, stirring until the sugar dissolves completely.
2. Add the white vinegar and red wine vinegar to the saucepan. Stir well to combine.
3. In a small bowl, mix the cornstarch with a little water to create a slurry. Add this to the saucepan, stirring continuously until the mixture thickens.
4. Stir in the finely minced onion, Dijon mustard, mustard powder, poppy seeds, sesame oil, onion powder, salt, garlic powder, celery seed, paprika, and black pepper. Mix well.
5. Bring the sauce to a gentle simmer and let it cook for about 5 minutes, stirring frequently.
6. Remove the saucepan from heat and let the sauce cool down.
7. Once cooled, transfer the sauce to a bottle or jar for storage.
Your homemade Subway Sweet Onion Sauce is ready to enjoy! Perfect for sandwiches, salads, and more!