This recipe shares how to cook kleftiko in a slow cooker (size 6.5L/6 Quarts). The dish can also be cooked in a lidded pot in a conventional oven at 160C/325F/Gas3 for 4-5 hours, but add the potatoes about 1 hour from the end of the cooking time instead of at the start as with the slow cooker method.
If you can't find Cypriot potatoes, you can substitute for Desiree potatoes.