If you prefer to present these halibut steaks with additional grill marks (as in the photo), you can grill the skin sides for about 1 minute each before grilling flesh.
6 (1-inch-thick) pieces halibut steak with skin (6 oz each)
Directions
Cook shallots and garlic in 1 tablespoon oil in a 3- to 4-quart heavy saucepan over moderately low heat, stirring occasionally, until softened, about 3 minutes. Add tomatoes, lemongrass, salt, and pepper and bring to a boil, stirring. Reduce heat and cook at a bare simmer, stirring occasionally, until tomatoes fall apart and form a chunky sauce, about 20 minutes.
Force sauce through a medium-mesh sieve into a bowl, pressing hard on and then discarding solids. Season with salt and pepper.
Prepare grill for cooking. If using a charcoal grill, open vents on bottom of grill, then light charcoal. Charcoal fire is medium-hot when you can hold your hand 5 inches above rack for 3 to 4 seconds. If using a gas grill, preheat burners on high, covered, 10 minutes, then reduce heat to moderate.
Brush fish on both sides with remaining 2 tablespoons oil, then season with salt and pepper. Grill fish, covered only if using gas grill, on lightly oiled rack, turning over once, until just cooked through, 7 to 8 minutes total. Serve fish with sauce.
