Grilled Tomato Relish

2 medium pear-shaped tomatoes, halved lengthwise
2 tablespoons extra-virgin olive oil
1 medium onion, chopped
1 clove garlic, minced or pressed
1⁄4 cup chopped fresh basil or 2 tablespoons dry basil
Pinch salt
Pinch freshly ground black pepper
Basil sprigs (optional)

Meanwhile, place the tomatoes on the grill, cut sides up, and brush them lightly with 1 tablespoon of the oil. When the tomatoes are browned on the bottom (about 3 minutes), turn them over and continue to cook until soft when pressed (about 3 more minutes).

While the tomatoes are grilling, combine the remaining 1 tablespoon of oil, the onion, and garlic in a medium frying pan with a heatproof handle. Set the pan over the coals (or set on the stove over medium-high heat). Cook, stirring often, until the onion is limp and golden (about 10 minutes). Stir in the basil.

When the tomatoes are soft, stir them into the onion mixture, then set the pan aside on a cooler area of the grill (or cover and keep warm on the stove).