You’ve probably seen kale at the salad bar—not necessarily
in the salads but underneath the salads.
It’s practically indestructible and also cheap, with thick stems and strong,
curly leaves.
Kale is often a deep green, but it can also have some
purple or blue streaks. It’s sold in
bunches in the fresh vegetable sections of most stores, and it holds up well in
the fridge. Avoid bunches that look
dried out or have yellowish leaves.