The real answer depends on your personal taste.
Just grilled with salt and pepper is a true simple classic.
Brinning first will add flavors and moisture.
A marinade is also great--I like Italian dressing (sometimes, simple is best).
In the end--its up to you. Tinker with the dish to find your favorite version--and enjoy the journey!!
__________________
Chef Al

The Independent Chefs Federation:
www.geocities.com/chefsfederation
"Trust a Chef who licks his own fingers"--William Shakespeare
"Only the pure of heart can make good soup"--Ludwig van Beethoven