Shrimp Cooked in Lime Juice

This is a Southeast Asian–style preparation, mildly sweet and mouth-puckeringly sour. It’s also ridiculously fast; if you start some rice before tackling the shrimp, they will both be done at about the same time, twenty minutes later. (This assumes your shrimp are already peeled, a task that will take you about ten minutes and one that should be undertaken before cooking the rice.) For best flavor, see if you can find head-on shrimp; they make for a more impressive presentation, and it’s fun to suck the juices out of the heads themselves (which, I realize, is not something that everyone enjoys). But none of these assets is worth making head-on shrimp a sticking point. Note that this technique will work with scallops or cut-up squid; each will take slightly less time to cook than the shrimp.