Place kale in a large bowl and drizzle with lemon juice, olive oil, salt and pepper. Massage with your hands for 45 seconds or until the kale turns bright green and starts to tenderize. Add strawberries and toss to combine.
Gently toast walnuts in a dry skillet over medium-low heat until they start to brown, about 3-4 minutes, stirring frequently. You'll know they're ready when you can smell them. Add to the salad and toss well.
Sprinkle in the cheese then toss one more time. Check for seasoning and adjust accordingly before serving.