In a large bowl wash and drain kale. Remove fibrous stems as needed. Squeeze the juice from half a lemon, add a pinch of salt, and a tsp of olive oil.
Using your hands, massage the leaves by rubbing and squeezing the kale until it darkens and becomes softer and more tender, which will lead to it being less bitter.
Serve with warm salmon and top with freshly grated parmesan cheese. Optionally, add sourdough croutons if desired.