Ingredients

• 1 , 1 1/4 pound
• salt and ground black pepper
• 0.33 cups ketchup
• 0.33 cups seasoned rice vinegar
• 1 , 8 ounce
• 2 tablespoons brown sugar
• 4 cloves garlic , minced
• 2 teaspoons hot chili sauce , such as Sriracha®
• 1 teaspoon soy sauce
• 1 pinch red pepper flakes
• 1 tablespoon vegetable oil
• 1 teaspoon butter
• 0.25 cups chopped green onion , white part only
• 2 tablespoons chopped green onion tops

Instructions

1. 1 Cut tenderloin into 4 pieces. Arrange in a single layer between two sheets of plastic wrap and pound with a meat mallet until each is about 1-inch thick. Generously season with salt and black pepper.
2. 2 Whisk ketchup, rice vinegar, reserved pineapple juice, brown sugar, garlic, hot chili sauce, soy sauce, and red pepper flakes in a bowl. Set aside.
3. 3 Heat vegetable oil in a skillet over high heat. Place pork in pan; reduce heat to medium. Cook until browned on both sides and cooked through, 5 to 6 minutes per side. Transfer to a plate.
4. 4 Return skillet to medium heat. Stir butter into hot pan. When butter melts and starts to brown, stir in pineapple chunks. Cook, stirring, until pineapple is golden brown, 3 to 4 minutes.
5. 5 Stir in ketchup mixture and 1/4 cup green onion (white parts). Reduce heat to low and simmer until garlic and onion have softened, 5 minutes.
6. 6 Return pork to skillet; cook, stirring, until pork is heated through. Garnish with 2 tablespoons green onion tops.

Nutrition per serving