Grilling Fish for Health and FlavorChef Perry P. Perkins  Many of us are looking for healthier grilling options without sacrificing great flavor.  When my readers contact me asking about great-tasting, guilt-free grilling, I always point them to one of my favorite food groups: fish and seafood. It's hard to beat a succulent, tender bite of firm salmon or tuna, with a crispy char on the outside and just a hint of smoke, fresh from the grill.  Fish and seafood are so simple to cook outdoors...and, ironically, they're one of those foods that intimidate a lot of backyard chefs.  But they shouldn't.  Fish is perfect for the grill. Direct high heat sears fish fast, sealing in moisture and flavor. A simple marinade (or just salt and pepper), a few minutes on each side, and voila, you have a delicious, nutritious dinner!  The biggest issue with grilling fish or seafood is making sure it doesn't stick to the grates. It's vital to carefully clean and oil your cooking surface, and some folks like to brush…