If you look back you may read that we had a terrible time figuring out how to best hold our lettuce/salad mix. What we’ve settled in with for now is, fresh heads, torn into a food tub for salad, then rinsed with cold water for about 15 minutes then it’s drained (mostly) and plastic wrapped, then put in the walk-in. Why the active running water vs. a simple dunking I’ll never know but when following this method we have eliminated the early browning that was flumoxing me. We go so far as to not add in our spring mix to the iceberg tub until just before service on the off chance that the colored lettuces were “bleeding”. I know it’s dumb…like I said this is what has worked for us though. We’ll now prep a couple tubs of salad mix during our morning prep and if there happens to be any left next day, it’s still quite presentable.