In a pressure cooker, Add chicken, pepper powder, water and salt. Pressure cook on high for 5 minutes.
In a food processor, add the cabbage and carrot. Chop it.
Transfer it into a bowl.
Add the cooked chicken into the food processor and chop it.
Transfer the chicken into the bowl with the veggies.
Add green chillies, red chilli flakes, mayo, cream cheese, sugar, parsley and black pepper. Mix well. The filling is ready.
Toast the bread slices in butter.
Put a generous amount of the filling on the bread. Add sriracha sauce and close the sandwich witht he other slice of bread. Serve immediately.