Tesco introduces rare, mini avocados or Zilla Egg   It’s the fruit sensation that’s graced millions of Instagram feeds and quickly become a breakfast staple. CHESHUNT, England, 2017-Aug-22 — /EPR Retail News/ — Now for a limited time only, customers at Tesco will be able to enjoy small, snack–sized avocados, as well as regular-sized varieties. Available in packs…