Grilled Bread Salad with Charred Corn, Tomatoes, Red Onion, Basil Vinaigrette

Vinaigrette

• 2 cups (packed) basil leaves
• 1 garlic clove, chopped
• ½ cup extra-virgin olive oil
• 2 tablespoons red wine vinegar
• 1 tablespoon lemon juice
• 1 teaspoon kosher salt
• ½ teaspoon freshly ground black pepper

Salad

• 1 small red onion, thinly sliced
• 4 ears corn, shucked and silk removed
• Extra-virgin olive oil
• Kosher salt
• ½ French or Italian baguette, halved lengthwise
• 3 ounces arugula
• 2 cups grape or cherry tomatoes, halved