Stem of Hearts Want to make your Purple Kale stem a little more presentable? Here is a neat trick we learned from one of our wonderful customers, Thank you Heidi from Swiss Flower Shop! With just a flick of your knife you can turn your kale stem into a stem of hearts! Place the blade of your knife pointing down along the stem, make a flicking motion downwards and tada! A heart is formed! Remember, practice makes perfect! Soon you will be a heart creating master!