Chipotle CEO Scott Boatwright said the solution to shrinking portion sizes is simple: just ask for more.The exec addressed the issue during an appearance this week on Yahoo! Finance. Customers have been complaining for months that fast food burgers are smaller, pre-packaged snacks have less food, and burritos from Chipotle aren’t as stuffed as they used to be. “If you want more, you should ask for a little more,” the fast food exec said. “I promi