In a medium size pot, on medium heat, add oil and heat it up.
Next add green cardamom and black peppercorns and now lightly sauté it for about 30 seconds.
Now add the onions and sauté the onion until they are golden brown.
Next add ginger garlic paste and mix well.
Add in the chicken and mix well.
Add tomatoes and yogurt and let it cook for 2-3 minutes.
Now add the briyani masala and mix well. (Remeber you are only adding 6 tbsp save the rest for future use.)
Next add in red chili powder, plum, lemon juice, and salt and mix well.
Add whole green pepper and mix well.
Let everything cook, stir occasionally during this process.
When the chicken is fully cooked set aside, the process will take around 10-15 minutes.
Turn off the stove and set the gravy aside.