Is it safe to make salads today for tomorrow?

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 :)

I'd probably do it today, just don't leave them out of the fridge for too long. Or can you do it first thing in the morning?

I'd do it today & put the dressing on tomorrow. And just keep them in the fridge

i'd make the garden salad today, but leave the pasta salad til tomorrow?

just my opinion anyway :)

Bug risks with cooked pasta are high, so I'd be cooking the pasta in the morning, but preparing the rest of the salad including the dressings today, and then adding dressings tomorrow.

Thanks ladies :)