Puree pineapple and cinnamon with water until smooth, set aside
Clean the lamb slices and cut into strips, removing all the fat you can from the meat. It is easier to cut if you freeze the lamb slightly.
Place lamb strips into the marinade, add additional water if needed, until lamb is completely covered, and allow to marinate for at least an hour in the refrigerator.
Preheat oven to 180 degrees fahrenheit.
Place on a cookie sheet 1/2 inches apart.
Dry in an oven, with the door slightly open to let out moisture, for about 3 to 4 hours, until meat is dry appearance and texture
Notes
If you have a food dehydrator that can be used to dry the lamb as well, just follow the manufactures instructions.