I tried a couple different ways of making this recipe. First, I made it as the recipe suggested but for 2 people. It took much longer than 10 minutes to de-stem one batch of watercress for two people, so I can imagine it would take double that for 4 people even though the recipe states 10 minutes for two batches. That was one of the main reasons I didn't care for this recipe. It took too long for something with so few ingredients. Since the dressing seemed to be OK, I tried it again tonight with baby spinach, since prepackaged baby spinach is alot faster.The dressing doesn't work very well with spinach. This recipe wasn't difficult, just time consuming. So two tries, two different ways and I think I'll have to pass on this recipe.