Easy Slow Cooker Korean Short Ribs

Ingredients

• 3-4 pounds beef short ribs (flanken cut, about 1/2 inch thick)
• 1 cup soy sauce
• 1/4 cup honey
• 1/2 cup brown sugar
• 1/4 cup sesame oil
• 1/4 cup rice wine (or mirin)
• 1 medium onion, grated
• 4 cloves garlic, minced
• 1 tablespoon fresh ginger, grated
• 2 green onions, chopped
• 1 tablespoon sesame seeds
• 1 teaspoon black pepper
• 1-2 teaspoons red pepper flakes (optional, for heat)