Taco Bell’s sales bottomed out the weekend of July 18-19 but have been steadily improving since then, Yum Brands Chief Financial Officer Ranjith Roy said Thursday in a conference call with investors. Over the last four days, Taco Bell’s U.S. sales have climbed halfway back to their year-ago level, he said. Yum Brands CEO Chris Turner said Taco Bell’s quick action to contain the issue and its clear communication on social media helped bring diners back. The retail price of a pound of iceberg lettuce jumped nearly 20% between January and June of this year, according to government data. The post Taco Bell’s quick action on removing lettuce, $1 Mexican Pizza special work to win over diners, investors appeared first on Fortune.