Season the chicken breast evenly with half of the sea salt and black pepper.
Place bacon slices in a cold skillet over medium heat and cook until crisp, then transfer to a paper towel and crumble once cooled.
Using the same skillet with the rendered bacon fat, sear the chicken breast for 5-7 minutes per side until the internal temperature reaches 165°F.
Let the chicken rest for 5 minutes before slicing it into thin strips.
Halve the cherry tomatoes, slice the cucumber into rounds, and dice the avocado.
In a large mixing bowl, whisk together the extra virgin olive oil, lemon juice, and the remaining salt and pepper to create a light vinaigrette.
Add the mixed salad greens, tomatoes, and cucumber to the bowl and toss gently to coat with the dressing.
Plate the dressed greens and top with the sliced chicken, crumbled bacon, and avocado.