Peel the corn.
Bring sufficient water to a boil in a wok.
Add the corn and cook for 10-12 minutes.
Take them out and allow them to cool completely.
To make the marinade, in a bowl, add hung curd, ginger-garlic paste, lemon juice, red chilli powder, turmeric powder, garam masala powder, dried fenugreek leaves powder, black salt, salt and mustard oil. Mix well.
Brush the marinade over the boiled corn.
Let the corn marinate for 30-40 minutes.
Place corn over direct flame and roast for a few seconds on each side.
Brush some butter over the charred corn.
Serve hot.