Grilled-Vegetable Sandwich

Serves 4

For Vegetables:
1 teaspoon dried oregano
2 tablespoons chopped fresh basil (optional)
1/2 teaspoon salt
1/2 teaspoon fresh-ground black pepper
1-1/2 teaspoons wine vinegar
3/4 cup olive oil
1 yellow squash, cut into 1/2-inch slices
1 zucchini, cut into 1/2-inch slices
2 red bell peppers, cut into wedges
1 red onion, cut into 1/2-inch slices

4 large crusty rolls, split
4 tablespoons store-bought or homemade pesto
4 leaves romaine lettuce
2 tomatoes, sliced

FOR VEGETABLES: Light the grill. In a large bowl, combine the oregano, the basil, if using, the salt, black pepper, vinegar, and oil. Add the squash, zucchini, bell peppers, and onion and stir to coat. Grill the vegetables in batches, turning once, until lightly browned and tender, 10 to 15 minutes per batch.

TO SERVE: Spread the inside of each roll with 1 tablespoon of the pesto. Sandwich the grilled vegetables, lettuce, and tomatoes in the rolls.

VEGETABLE TIP: Slice zucchini lengthwise for grilling, so that you won't have to contend with all those little rounds of squash threatening to fall through the grate.