Grilled Scallops with Tomato-Onion Relish

1/2c. finely chopped red onion3/4tspn. salt
1large tomato, seeded and chopped4tspn. red-wine vinegar
1tspn. sugar2Tbls. chopped fresh dill
24sea scallops (1-1/2 lb)Vegetable oil for brushing grill


Prepare grill for cooking. Soak onion in 1 c. water with 1/2 teaspoon salt for 15 minutes, then drain. Stir together onion, tomato, vinegar, sugar, and remaining 1/4 teaspoon salt and let stand 20 minutes. Drain relish in a sieve, discarding liquid, then stir in dill. Cook scallops while relish is standing. Pat scallops dry and season with salt and pepper. Grill scallops in 2 batches on lightly oiled grill rack, turning once, until just cooked through, 4-5 minutes. Serve scallops with relish.