In less than a year, United Natural Foods (NYSE: UNFI ) has run from under $10 to $27 a share, providing an exceptional return for investors. Given the stock has exhibited relatively muted increases in EBITDA over last year’s trough, someAnalyst’s Disclosure: I/we have a beneficial long position in the shares of UNFI either through stock ownership, options, or other derivatives. I wrote this article myself, and it expresses my own opinions. I am not receiving compensation for it (other than from Seeking Alp ...