Caramel Chicken

INGREDIENTS

• 2 scallions, thinly sliced
• 2 1/2 pounds skin-on, bone-in chicken legs and thighs
• 1/4 cup reduced-sodium soy sauce
• 2 tablespoons vegetable oil
• 1/4 cup (or more) unseasoned rice vinegar
• Cooked white rice (for serving)
• 1 cup low-sodium chicken broth
• 8 garlic cloves, peeled
• 1/3 cup (packed) light brown sugar
• Kosher salt
• 2 1/4"-thick slices peeled ginger