Missa Bay, LLC Recalls Salad Products Due to Possible E. coli O157:H7 Contamination
...but no word on how/when/where the lettuce became contaminated.
I had read earlier this week the source was in California. Unless that was for a different salad outbreak.
Sorry, it was this one I was thinking of:
https://www.foodsafetymagazine.com/news/new-romaine-lettuce-e-coli-outbreak-investigation-kept-secret-for-6-weeks/