Pre heat oven to 400F.
In a cooking pan, add enough oil for frying chicken thigh or breast.
If using chicken thigh, fry skin side down first, for 3 minutes. Then turn it over and fry for another 2 minutes. If using chicken breast, fry each side for 1 minute.
Transfer chicken to baking pan, lined with aluminum foil or using grilling rack if available. Brush both sides of chicken thigh/breast with Cajun sauce. And grill for 10 minutes.
After 10 minutes, check if chicken is done cooking. If not, continue cooking for another 5 minutes.
When chicken is thoroughly cooked, take the pan out of the oven and immediately sprinkle grated Emmental or Parmesan cheese on top of it. With the continuing heat, the cheese should be melted right away.