Mix together lamb mince, ginger, garlic, green chillies, red chilli powder, nutmeg powder, garam masala powder, lemon juice and browned onions in a bowl.
Roughly chop mint leaves, reserve some of it and add the rest to the mince mixture and mix well. Add salt and mix well. Set aside to marinate for fifteen to twenty minutes.
Heat a piece of coal.
Place a steel katori in the middle of the mince mixture. Put the coal in the katori and pour one tablespoon ghee over the coal. Cover immediately to trap the smoke and keep it covered for two to three minutes.
Remove the cover and katori from the mince mixture and mix the mixture well. Transfer the mixture into a blender jar, blend coarsely and transfer into a bowl.
Roll out the dough into a large disc. Apply little ghee all over and sprinkle reserved mint leaves on top and knead again. Divide into four equal portions and roll out into medium size paranthe.
Heat a non-stick tawa. Place the paranthe on it, one after the other, and roast, basting with ghee, till evenly done from both sides. Keep them on a plate.
Break the egg in a bowl and whisk well. Add salt and whisk again.
Heat oil in a non-stick pan.
Dampen your palms, divide the mince mixture into eight equal portions and shape them into kababs.
Dip the kababs, one by one, in the whisked egg, place in the pan and shallow-fry, turning sides, till evenly done and golden from both sides. Drain on absorbent paper.
Garnish the kababs with mint sprigs and serve hot with paranthe and onion rings.