Cut the beef across the grain into ¼ to ⅛-inch thick slices. Or, have the butcher slice the meat.
Mix the sesame oil, soy sauce, light brown sugar, fresh garlic, pineapple juice, ginger, and sesame seeds in a bowl.
Place the beef and marinade in a gallon size plastic bag and move the content around until the meat is covered.
Marinate in the refrigerator for 12-24 hours.
Drain and discard the marinade.
Place the marinated beef on the wire trays in the dehydrator. Expert Tip: You don't want to dry the marinade off the meat but you can lightly pat any dripping liquid from the beef jerky sticks if they are dripping too much.
Close the door and dehydrate at 165°F for 4-6 hours.
To test for doneness, remove a piece of jerky from the food dehydrator and allow it to cool for at least 5 minutes. When bent, it should slightly crack, but not break.
When done, serve and enjoy. Store leftovers in an airtight container.