Sweet Onion Sauce with Subway Flavor (Print version)
A tangy, glossy sweet onion sauce with Subway flavor for homemade subs, wraps, salads, and grilled chicken.
# Ingredients:
For the onion base
01 -
1 small sweet onion, thinly sliced
02 -
1 teaspoon neutral oil, such as canola or grapeseed
03 -
1/4 teaspoon fine salt
04 -
1/4 cup (60 ml) water
For the sauce
05 -
1/2 cup (100 g) granulated sugar
06 -
3 tablespoons white vinegar
07 -
1 tablespoon red wine vinegar
08 -
1 teaspoon Dijon mustard
09 -
1/4 teaspoon toasted sesame oil
10 -
1 teaspoon onion powder
11 -
1/4 teaspoon garlic powder
12 -
1/4 teaspoon celery seed, lightly crushed
13 -
1/4 teaspoon paprika
14 -
1/8 teaspoon black pepper
15 -
1/4 teaspoon fine salt, plus more to taste
16 -
1 tablespoon cornstarch mixed with 1 tablespoon cold water
17 -
1/2 teaspoon poppy seeds
# Instructions:
01 -
Heat the oil in a small skillet over medium heat. Add the sliced onion and 1/4 teaspoon salt, then cook for 10-12 minutes until soft, sweet-smelling, and lightly golden.
02 -
Transfer the onion to a blender with 1/4 cup water. Blend until very smooth. Strain through a fine mesh sieve for a smoother sauce, if desired.
03 -
Pour the onion liquid into a small saucepan. Whisk in the sugar, white vinegar, red wine vinegar, Dijon, sesame oil, onion powder, garlic powder, celery seed, paprika, black pepper, and remaining salt.
04 -
Whisk in the cornstarch slurry. Bring to a gentle simmer over medium heat and cook for 2-3 minutes, whisking often, until glossy and lightly thickened.
05 -
Remove from the heat and stir in the poppy seeds. Cool completely, then transfer to a clean jar or squeeze bottle and refrigerate for at least 1 hour before serving.
# Good to know:
01 -
Makes about 1 1/4 cups sauce, or 12 servings of about 2 tablespoons each.
02 -
Flavor is best after chilling for at least 1 hour.
03 -
Keep refrigerated and use within 2 weeks.