Since shrimp is a fast-cooking seafood, it cooks in a few minutes. If you cook it for a long time, it will become rubbery. You'll know it's cooked when it starts to turn slightly pink. In the recipe, Jumbo shrimp is cooked in about 3 minutes on each side. However, if you use small grass shrimp, it is enough to keep it for 1-2 minutes.