Season the cubed chicken breast with cumin, chili powder, garlic powder, and a pinch of salt.
Heat olive oil in a large skillet over medium-high heat.
Cook the chicken for 8 to 10 minutes, stirring occasionally, until the internal temperature reaches 165°F (74°C). Remove from heat and let rest.
In a small mixing bowl, whisk together the Greek yogurt, lime juice, minced cilantro, and 0.5 tsp sea salt until smooth to create the dressing.
In a large assembly bowl, combine the chopped romaine lettuce, black beans, corn, cherry tomatoes, and red onion.
Distribute the salad base into four bowls.
Top each bowl with the cooked chicken, diced avocado, and crumbled cotija cheese.
Drizzle each serving with the yogurt-based dressing and garnish with crushed tortilla chips immediately before serving.