Grilled Chicken with Charred Lemon and Heirloom Tomatoes

Name: Grilled Chicken with Charred Lemon and Heirloom Tomatoes
Ingredients: 1 1/4 cups extra-virgin olive oil, plus more for brushing; 1 tablespoon Worcestershire sauce; 1 to 2 pinches crushed red pepper flakes; 2 medium onions, sliced into 1/2-inch-thick rounds; 2 bunches scallions, roots trimmed; 1 lemon, sliced; 2 whole chickens, 2 1/2 to 3 pounds each, cut into 8 pieces; Salt and freshly ground black pepper; 1/2 cup chopped fresh parsley; 1 tablespoon red wine vinegar; 2 to 3 anchovies, well rinsed, finely chopped, optional; 4 to 6 slices ciabatta bread; 6 to 8 medium very ripe heirloom tomatoes or juicy beefsteak tomatoes, cut into wedges