Cooking fish doesn't need to be intimidating. In fact, few things could be simpler—or more rewarding. For meaty steaks of swordfish, albacore, and halibut, all you need is a kiss of high heat from a grill or cast-iron pan and a simple vinaigrette. Zesting citrus directly onto your food means no wasted precious aromatic oils and zero chance of the zest drying out before you use it.