Season the chicken breast evenly with half of the sea salt and black pepper.
Heat avocado oil in a skillet over medium-high heat and sear the chicken for 6 to 7 minutes per side until golden brown and cooked through.
While the chicken rests, place the chopped kale in a large mixing bowl with a pinch of salt and a small squeeze of lemon juice.
Massage the kale with your hands for 2 to 3 minutes until the leaves soften, shrink in volume, and turn a deep, dark green.
In a small bowl or jar, whisk together the extra virgin olive oil, remaining lemon juice, lemon zest, minced garlic, and remaining pepper to create the vinaigrette.
Slice the rested chicken breast into thin strips.
Toss the massaged kale with the vinaigrette, then top with the sliced chicken, pumpkin seeds, and shaved parmesan cheese before serving.