Savory and a little sweet, this light dinner tastes like spring but can be made any time of year — and any night of the week if you keep a stash of shrimp in your freezer. By quickly thawing them under running water, then dry-brining them with salt for a minute, you end up with juicier, snappier shrimp that taste incredibly fresh. Asparagus spears also cook fast until they’re as crisp-tender as the shrimp. By slicing them at a sharp angle, you reduce any stringiness in the stalks. For a spicy stir-fry, use the chile and keep the seeds in. For a little less heat, remove the seeds after slicing. Stirring a final pat of butter into the sauce, which is sweetened with onion and salty with soy, binds together all of the ingredients with a touch of richness. Serve over rice to sop up that sauce or over tender, leafy greens for a warm salad.