Sesame Pork Ribs

Ingredients

• 1/2 cup packed brown sugar
• 1/4 cup soy sauce
• 1/4 cup ketchup or 1/4 cup barbecue sauce
• 1 tablespoon oyster sauce
• 1 tablespoon hoisin sauce
• 2 tablespoons honey
• 1 tablespoon cider or 1 tablespoon white wine vinegar
• 1 1/2 garlic cloves, minced (or more)
• 1/2 teaspoon ground ginger
• 1/2 teaspoon salt
• 1/4 teaspoon crushed red pepper flakes (or more)
• 2 1/2 lbs country-style pork ribs
• 1/2 medium onion, sliced
• 1 tablespoon cornstarch, dissolved in 2
• 1 1/2 teaspoons water
• 1 tablespoon sesame seeds, toasted
• 6 thinly sliced green onions
• 1/2 bunch chopped fresh cilantro leaves (optional)