Ingredients 1 (12-ounce) boneless beef sirloin steak (about 1 inch thick), trimmed 1/4 teaspoon kosher salt 1/8 teaspoon freshly ground black pepper 2 tablespoons canola mayonnaise 2 tablespoons refrigerated pesto sauce 1 (12-ounce) piece white or whole-grain baguette, split in half horizontally 1 cup packed baby arugula (about 1 ounce) 3 (1/8-inch-thick) red onion slices […]
