Add 1 tablespoon of the vegetable oil and swirl to coat the pan. When the oil is hot, scatter in the shrimp. Cook undisturbed until the shrimp begin to change color and firm up, about 30 seconds. Toss well then continue to cook, stirring frequently, until the shrimp are pink, firm, and just cooked through, about 30 seconds longer. Using a slotted spoon, transfer the shrimp to the clean bowl.