Mix chicken pieces with salt, turmeric and chilli powder and set aside to marinate for about an hour. In a non-stick pan, heat oil and fry chicken till brown and cooked through. Remove from pan and set aside.
In the same pan, saute curry leaves, green chillies, garlic till fragrant. Add sliced onions and fry till lightly transparent. Add green pepper, salt, and pepper, and fry for another minute or two.
Add in fried chicken pieces and soya sauce and cook for 3-4 minutes, allowing flavours to blend well.