Shrimp cook in about 3 minutes. I'll do this in a big pot in the kitchen rather than outside, unless I have a ton of people coming over.
Use 1 pack of Zatarain's Crab, Shrimp and Crawfish Boil seasoning for quantities of shrimp up to 5 pounds. Bring it to a boil with whatever else you're putting in with the seafood -- corn, potatoes, onions, lemons, etc. -- and let that boil for about 10 minutes, until the corn and potatoes are cooked. Add the shrimp and let boil for THREE MINUTES only!. You may then strain and eat, but I like to dump some ice into the pot and let the shrimp soak for a while -- the longer they soak in the seasoned liquid, the spicier they get!
Recipe from: Uglesich's in New Orleans
1 ½ cups olive oil, not extra-virgin
½ cup ketchup
2 to 3 tablespoons Melinda's habanero hot sauce (XXX, the hottest one they make; I guarantee the dish will be too mild without it, although you may substitute if you're a pepper wimp)
1 tablespoon fresh squeezed lemon juice
1 tablespoon salt
2 teaspoons crushed red pepper flakes
1 teaspoon sweet paprika
1 green bell pepper, stemmed, cored, seeded and cut into 1" pieces
1 small red onion, peeled and chopped
1 teaspoon chopped fresh Italian flat-leaf parsley
2 pounds medium-sized shrimp, peeled and deveined, with tail left on
3 medium red-skinned potatoes, cut into 1 inch cubes and boiled until just tender
4 chives, finely chopped
Place all ingredients except the shrimp, potatoes and chives into a glass bowl and mix well. Cover with plastic wrap and keep in the refrigerator for at least two days, up to one week (the longer the better, so that the flavors will have more time to marry and intensify), stirring occasionally. Let the marinade come to room temperature before preparing the dish.
Using a large spoon, skim off almost all of the oil from the top of the marinade. (You can either discard it or use it for a basting sauce or any other use you can think of.) Put the marinade into a large skillet, then add the shrimp. Cook over medium heat just until the shrimp turn pink and opaque, about 3 to 4 minutes, then turn the shrimp, add the potatoes, then cook until the potatoes are heated through, about 2 to 3 more minutes. Season to taste with salt and freshly ground black pepper.