Subway Sweet Onion Sauce (Copycat)

INGREDIENTS

• 1 cup granulated sugar (plus 2 tablespoons)
• 1/2 cup plus 1 tablespoon cold water
• 6 tablespoons white vinegar
• 1 1/2 tablespoons red wine vinegar
• 1 tablespoon arrowroot
• 1 tablespoon minced onion flakes
• 2 1/2 teaspoons Dijon mustard
• 2 1/2 teaspoons mustard powder
• 3/4 teaspoon celery salt
• 3/4 teaspoon fresh onion juice (use a garlic press)
• 3/4 teaspoon poppy seed
• 1/2 teaspoon onion salt
• 1/4 teaspoon garlic salt (plus 1/8 teaspoon)
• 1/4 teaspoon paprika (plus 1/8 teaspoon)
• 1/4 teaspoon black pepper (plus 1/8 teaspoon)
• 1 -2 drop sesame oil