Ginger-Mustard Barbecue Sauce

Ingredients1 12-oz. bottle or can of ginger ale (such as Seagram's)¼ cup yellow mustard2 Tbsp. Dijon mustard½ Piece ginger, peeled, finely chopped3 Garlic cloves, finely chopped½ Cup grated sweet onion3 Tbsp. honey1 Tbsp. granulated sugar2 Tbsp. Diamond Crystal or 1 tsp. kosher salt1 Tbsp. apple cider vinegar½ Tbsp. coarsely ground black pepper¼ Tbsp. crushed red pepper flakesPreparationStep 1: Whisk ginger ale, yellow mustard, and Dijon mustard in a medium saucepan to combine. Bring to a simmer over medium heat; reduce heat to low and gently simmer 3 minutes. Whisk in ginger, garlic, onion, honey, sugar, salt, vinegar, black pepper, and red pepper flakes and cook, stirring occasionally, until flavors have come together and sauce is very fragrant, 15–20 minutes. Let cool before using.Do ahead: Sauce can be made 2 days ahead. Transfer to an airtight container; cover and chill....