Butterfly the shrimp leaving shell intact. Remove vein. Rinse and pat dry with paper towels.
Sprinkle salt and pepper and drizzle sesame oil over the shrimps. Mix well.
Heat vegetable oil in a large non-stick fry pan.
Place shrimp butterfly side down in the pan. Sear for 2 minutes.
Turn shrimp onto their sides and sear for another minute.
Flip shrimps onto the other side and sear one more minute.
Remove and serve immediately with your favorite seafood cocktail sauce.