Pat the chicken breast dry with paper towels and season both sides evenly with sea salt, black pepper, dried oregano, and garlic powder.
Heat half of the olive oil in a medium skillet over medium-high heat until shimmering.
Place the chicken in the skillet and sear for 6 to 7 minutes per side, or until the exterior is golden-brown and crispy and the internal temperature reaches 165°F.
While the chicken is cooking, combine the mixed baby greens, sliced cucumber, and halved cherry tomatoes in a large salad bowl.
In a small jar or bowl, whisk together the remaining olive oil and the fresh lemon juice to create a light vinaigrette.
In a small dry pan over medium heat, lightly toast the sliced almonds for 2 minutes until fragrant and slightly browned.
Remove the chicken from the skillet and let it rest for 3 minutes before slicing it into thin strips.
Drizzle the dressing over the salad greens and toss gently to coat.
Top the salad with the sliced chicken and toasted almonds for a final crunch.