Season the chicken breast evenly on both sides with ground cumin, sea salt, and black pepper.
Preheat a grill or grill pan over medium-high heat and lightly coat with a touch of oil spray if needed.
Grill the chicken for 6 to 7 minutes per side, or until the internal temperature reaches 165°F.
Remove the chicken from the heat and let it rest for 5 minutes before slicing into thin strips.
In a small jar or bowl, whisk together the extra virgin olive oil, lime juice, and minced garlic to create the dressing.
In a large salad bowl, combine the mixed greens, halved cherry tomatoes, sliced cucumber, and finely diced red onion.
Toss the salad gently with the prepared lime dressing until the leaves are lightly coated.
Top the salad with the sliced grilled chicken, diced avocado, and crunchy pepitas.
Serve immediately while the chicken is still warm for the best flavor contrast.