Dark leafy green vegetables are a great way to boost the nutrition in your meals. Some can be a bit bitter however. To cut some of the bitterness of greens like kale or arugula, soak them in a bowl of ice water in your fridge for about an hour. Run them through a salad spinner and then use them as normal in your recipes. You can also boil kale before using to cut more of the bitterness. Finally, a squeeze of lemon or lime juice can also balance out the bitter taste.