Season the chicken breast with a pinch of the sea salt and black pepper.
Heat a grill or grill pan over medium-high heat and cook the chicken for 6-7 minutes per side until the internal temperature reaches 165°F.
Remove the chicken from heat and let it rest for 5 minutes before slicing into thin strips.
In a large mixing bowl, combine the kale with the lemon juice and half of the olive oil.
Massage the kale with your hands for 2-3 minutes until the leaves become dark green and tender.
Slice the strawberries, dice the apple, and halve the cherry tomatoes and cucumber.
Add the strawberries, blueberries, apple, cucumber, and tomatoes to the kale base.
Drizzle the remaining olive oil over the salad and toss gently to combine.
Top the salad with the sliced grilled chicken and the pecans.
Finish with the remaining sea salt and black pepper before serving.