01 -
In a small bowl, mix together the pineapple juice, soy sauce, brown sugar, garlic powder, ground ginger, and black pepper.
02 -
Place the beef loin in the slow cooker and top with pineapple chunks, sliced onion, and bell pepper.
03 -
Pour the pineapple juice mixture over the beef and vegetables.
04 -
Cover the slow cooker and cook on low for 6-8 hours, or until the beef is tender.
05 -
Once cooked, remove the beef from the slow cooker and let it rest for a few minutes before slicing.
06 -
Serve the beef slices with the pineapple and vegetables, spooning some of the cooking juices over the top.