like arugula or kale, in a bowl of ice water in the fridge for about an hour to cut their bitterness. Run the leaves through your salad spinner several times with a paper towel to get them nice and dry and crisp.
—Dina Avila, of Leek Soup
https://www.womenshealthmag.com/food/a19982068/cooking-tips/
Soak bitter greens…
The Purple Almond Kitchen 