Toss the diced chicken with minced chipotle peppers in adobo and cumin until evenly coated.
Heat olive oil in a skillet over medium-high heat and cook the chicken for 12 to 15 minutes, stirring occasionally, until golden and cooked to 165°F / 74°C.
Whisk together sour cream, lime juice, and cilantro in a small bowl until smooth.
Divide the romaine lettuce among four bowls and top each with black beans, corn, pico de gallo, and cooked chicken.
Drizzle the cilantro-lime dressing over each bowl and serve immediately.