Step 1: Marinate the Chicken
In a small bowl, mix olive oil, cumin, chili powder, salt, and pepper. Rub this mixture on both sides of the chicken breasts. Let it marinate for at least 15 minutes (or up to 1 hour for more flavor).

Step 2: Grill the Chicken
Heat a grill or grill pan over medium heat. Grill the chicken for about 6-7 minutes per side, or until fully cooked through (internal temperature of 165°F). Once done, let the chicken rest for 5 minutes before slicing it thinly.

Step 3: Prepare the Salad Base
In a large salad bowl, combine the mixed greens, cherry tomatoes, corn, black beans, avocado, and bell pepper. Toss everything together gently.

Step 4: Make the Dressing
In a small bowl, whisk together lime juice, cilantro, a pinch of salt, and pepper. If you want a creamy dressing, you can add a dollop of sour cream or Greek yogurt.

Step 5: Assemble the Salad
Top the salad base with the grilled chicken slices. Drizzle the dressing over the top and toss gently to combine. Optional: Sprinkle some shredded cheese on top for added flavor.