Place bulgur in a bowl and pour the boiling water over. Cover with plastic wrap and let stand until bulgur is tender and most of the water is absorbed, about 1 to 2 hours.
Drain off any excess liquid from the bulgur and stir in the arugula, green onions and mint.
Whisk together the lemon juice, garlic and oil and season with salt and pepper. Pour the mixture over the bulgur and season with salt and pepper.
Transfer tabbouleh to a platter and top with the grilled shrimp. Garnish with fresh mint leaves.
Combine juice, mint, oil and pepper in a blender and blend until smooth. Place shrimp in a bowl, pour marinade over and stir to coat evenly in the marinade. Marinate for 10 minutes.
Heat grill to high. Season shrimp with salt and grill for 1 to 2 minutes per side or until slightly charred and just cooked through.