Start your coals for your grill and then spread them on one side of your grill for indirect heat grilling.
Meanwhile, thread the cubed salmon and lemons onto two bamboo skewers each in an alternating fashion. Use two skewers so that the delicate fish won’t fall off into the fire.
In a microwave safe bowl, melt the butter, mustard, dill, garlic and salt and pepper. Pour some of the butter over each kebab reserving some for basting while grilling.
Oil your grill grates well, then place the kebabs away from the fire. Cook for 10-15 minutes, turning and basting occasionally until the fish is cooked through.