First of all butterfly the breasts. To do this, keep the breast flat on a chopping board, put your hand flat on it to keep it in its place. Using a knife & slice the breast horizontally to split it but not till the end. It should open like a book.
Now season both the chicken breasts with salt, pepper, little oil and herbs.
Now you need to put the chicken breasts on each other, sandwiching salami, cheese slices and seasoning in between. It should look like a sandwich.
Now heat oil in the pan and cook the chicken breasts in a pan. Also, add a garlic clove in the pan.
Cook it on both sides for 4-7 minutes each.
Tilt the pan a little bit, take a spoon and start braising the chicken with the oil which now has the garlic flavour.
Once they are cooked and it have a beautiful light brown color, take them out and keep aside.
Roast them in the oven for 20-25 minutes on 200 degree Celsius.
Now use the same pan and add onions in it.
Then add in the ginger garlic paste, some mustard sauce and start cooking.
Add some seasoning and dried herbs and rosemary.
Once cooked serve it in a plate as the base.
Take out the chicken from the oven keep it on top of the cooked onions sauce.
Do note that once chicken is out of oven, you need to let it rest for 5-10 minutes for it to stop cooking and the juices to set.