Ingredients 1 (18-inch) cedar plank 1 poblano chile, seeded and halved 1 jalapeño pepper, seeded and halved 1 small red onion, cut into (1/2-inch-thick) slices Cooking spray 2 cups chopped seeded heirloom tomato 3 tablespoons chopped fresh cilantro 1/2 teaspoon kosher salt, divided 1/2 teaspoon freshly ground black pepper, divided 1 diced peeled avocado 1 […]