Preheat your oven to 400°F and line a baking sheet with parchment paper.
Season the chicken breast with half of the sea salt, black pepper, garlic powder, and smoked paprika.
Roast the chicken for 20-25 minutes or until the internal temperature reaches 165°F, then let it rest for 5 minutes before slicing.
While the chicken roasts, place the chopped kale in a large mixing bowl with a pinch of salt and half of the olive oil.
Massage the kale with your hands for 2-3 minutes until the leaves are dark green, tender, and reduced in volume.
In a small jar or bowl, whisk together the remaining olive oil, lemon juice, and the rest of the spices to create the dressing.
Slice the avocado into thin wedges and roughly chop the roasted chicken.
Add the chicken and avocado to the bowl of massaged kale.
Drizzle the lemon vinaigrette over the salad and toss gently to combine.
Garnish with pumpkin seeds for a satisfying crunch and serve immediately.