In a saute pan over medium heat, melt butter and saute pear slices for approximately 3 minutes per side, or until they begin to brown.
2
In a toaster, toast 4 pound cake slices. Take 2 toasted pound cake slices, smear with Nutella, sprinkle generously with hazelnuts, Top with pear slices and cover with second slice of pound cake. Cut each knuckle sandwich into 4 pieces on the diagonal and crunch away.