Ingredients

1/2 c. (plus 1 tbsp.) soy sauce

1/4 c. brown sugar

1 1/2 tbsp. sriracha

2 cloves garlic, minced

2 tsp. ginger

2 tbsp. (plus 2 tsp.) rice vinegar

2 tsp. crushed red pepper flakes

1 tbsp. cornstarch

1 tbsp. water

1 c. Napa cabbage, shredded

1 purple cabbage, shredded

1 jalapeño, seeded and thinly sliced

1/4 English cucumber, thinly sliced

kosher salt

1 lb. ground short rib (other ground beef can be substituted)

2 tbsp. unsalted butter

3 sesame seed hamburger buns

Preparation

Step 1In a medium saucepan over medium heat, combine ½ cup soy sauce, brown sugar, Sriracha, garlic, ginger, 1 tablespoon rice vinegar, and 1 teaspoon crushed red pepper flakes and bring to a boil. In a small bowl, stir together cornstarch and water and add to saucepan. Reduce heat to low and let thicken, 5 to 10 minutes.Step 2Toss cabbage and jalapeño with 2 teaspoons rice vinegar, 1 teaspoon soy sauce, 1 teaspoon crushed red pepper flakes, and sesame seeds.Step 3Toss cucumber with remaining tablespoon rice vinegar and a pinch of salt.Step 4Form meat into three equal-sized patties. Brush one side with Korean BBQ sauce.Step 5Heat cast-iron skillet over medium-high heat and melt butter. Add burgers sauced-side-down and brush other side with sauce. Cook 2 to 3 minutes per side for medium rare.Step 6Build burgers by topping buns with cucumbers, patty, more Korean BBQ sauce, and slaw.