Subway Sweet Onion Sauce
Ingredients
- 1 cup sugar
- 1/2 cup water
- 6 tablespoons white vinegar
- 1 1/2 tablespoons red wine vinegar
- 1/2 tablespoon finely minced onion
- 1 tablespoon cornstarch
- 2 teaspoons Dijon mustard
Step-by-Step Instructions
1. Combine Sugar and Water
In a small saucepan, combine the sugar and water over medium heat. Stir continuously until the sugar dissolves completely, creating a simple syrup base for the sauce.
2. Add Vinegars and Onion
Once the sugar has dissolved, stir in the white vinegar, red wine vinegar, and finely minced onion. Continue stirring gently to ensure everything is well combined. Let the mixture simmer for about 2–3 minutes , allowing the flavors to meld together.
3. Prepare the Cornstarch Slurry
In a separate bowl, mix the cornstarch with 2 tablespoons of cold water until smooth. This slurry will help thicken the sauce.
4. Thicken the Sauce
Gradually pour the cornstarch slurry into the simmering mixture while whisking continuously. Cook for an additional 1–2 minutes , or until the sauce thickens slightly. Be careful not to let it boil too vigorously, as this could affect the texture.
5. Stir in Dijon Mustard
Remove the sauce from heat and stir in the Dijon mustard. This adds a subtle kick and enhances the overall flavor profile.
6. Cool and Store
Transfer the sauce to a jar or container and let it cool to room temperature. Once cooled, cover and refrigerate for at least 1 hour before using to allow the flavors to develop fully.
Pro Tip: For a smoother consistency, blend the sauce briefly in a blender or food processor after cooling.