Though deveining is often thought of as a tiresome task, it's really quite simple. Eating this vein won't make you sick, but it can be gritty. To devein shrimp without peeling, cut down the back of the shrimp with kitchen shears and then pull out the vein with the tip of a paring knife. To devein a peeled shrimp, slit the flesh with a knife and lift out the vein. Then gently lift out the vein with the tip of your knife.
Butterflied shrimp are simply shrimp that have been cut open to lie flat.
Keep in mind that the larger surface area means the shrimp cook more quickly. Butterflied shrimp are perfect for a superquick spin in the wok or as a platform for a seafood stuffing. Slice just deep enough to open up the shrimp without cutting it in half. Ready to stuff. A perfectly butterflied shrimp creates a neat pocket for a savory seafood stuffing.