Make the dressing ahead...but chop the cilantry and the onions and add at the last minute.
Wash the cilantro, shake it as dry as you can (but still damp),wrap in paper towel and then in a plastic bag.
Sounds yummy!
Linda C

Thanks Linda. I just went back to wrap my cilantro in slightly damp paper towels. And I'll make the dressing in the morning before I leave - much easier. Thanks so much.

Lynn.

I agree with Linda

Do you have a salad spinner? I always wash my cilantro & parsley when I get it home, spin it as dry as I can & store it in a ziploc bag with a few paper towels in the fridge. I find it stores best when dry - lasts for a week. Wrap your green onions in paper towels too as they are always soaking wet at the store from the water they keep spraying on the veggies.

I wouldn't do anything ahead. I'd take my ingredients, a good knife & a small plastic cutting board with me. Take a bottle of olive oil (or a small well-sealed container), a fresh lemon or two and your salt & pepper with you). Pack the cilantro & onions in a small cooler. Cook the potatoes there in the beach house kitchen, and then all you need to do is mix up the dressing & chop the cilantro & spring onions - you can do that even in any cramped, ill-equipped kitchen. The dressing is so simple you can even get by not mixing it, but just sprinkling all the ingredients over the potatoes and just gently tossing. This is my kind of cooking! Have a great weekend...

Here's how I keep cilantro and parsley, and it keeps this way for a looooooooooooog time - a couple of weeks at least. No kidding!

Simply place stems in glass of water, then put a baggie loosely over it all. Place in fridge (I use a door shelf). Add additional water if / when needed to glass.

To use, just remove baggie and clip of what you need, then replace baggie. Works beautifully!!!

MaryT :)

I also place the stems in a glass of water, if I want to keep them for any length of time. Everts bags work well also, but no matter how you store it (unless you preserve it), the leaves must be as dry as possible. I dry them with a paper towel at the end and then wrap them with a dry paper towel - and this is my most extravagant use of paper towels! At some markets I've found cilantro with the roots still on, and those last even longer in a glass of water. Still, even a live plant has a very short life, even when grown in a pot.

The salad dressing that you are making could be made a couple of days in advance, and you could add the cilantro to that at that time - the dressing will act as a preservative. I make a similar dressing/marinade, but I use limes instead of lemon, and it preserves the cilantro for at least two weeks. I also frequently make an herb vinaigrette with fresh herbs, and it stays fresh for a couple of weeks as well. I make it in the summer when I have fresh herbs in my garden, as I do now.

Lars