Preheat oven to 375°F. Slice the corn tortilla into thin strips, place on a baking sheet, and bake for 8-10 minutes until golden and crispy.
Season the chicken breast evenly with chipotle powder, sea salt, and black pepper.
Heat olive oil in a skillet over medium-high heat. Add the chicken and sear for 5-7 minutes per side until the internal temperature reaches 165°F. Let rest for 5 minutes before slicing.
While the chicken rests, chop the romaine lettuce, halve the cherry tomatoes, and dice the bell pepper. Place them in a large salad bowl.
In a small ramekin, whisk together the Greek yogurt, lime juice, and minced cilantro to create a creamy dressing.
Slice the avocado and place it on top of the greens along with the sliced chicken and crispy tortilla strips.
Drizzle the creamy lime dressing over the salad and toss gently before serving.