Hi ladies,

We have our baby shower BBQ tomorrow & I went & bought fresh mixed leaves, tomatoes, cucumber etc today & I was wondering is it safe to wash them all chop them up & just add the dressing tomorrow or do I need to wait until tomorrow, I know about listeria but just wondering if this causes a risk?
Also I'm making a pasta salad with a sour cream, mustard & lemon juice dressing, does this need to be cooked fresh tomorrow as well or could I do it today?
TIA for your advice