Top each Naan with half of the oregano and ¼ of the Feta cheese.
Add Naan to indoor grill pan (topped side up). Grill for three or four minutes.
Top each Naan with ½ of the arugula, half of the olives and a ¼ of the balsamic vinegar.
Add cooked shrimp and cook for no more than one minute. Top each Naan with half of the shrimp and the remainder of the feta.
Turn on broiler.
Add grill pan to broiler.
Broil Naan for no more than five minutes each. Less is actually better. You just want the feta to begin to melt.
Top with remaining balsamic (drizzle) and fresh chopped basil.