In fish,add red chili crushed,carom seeds,salt,coriander seeds,red chili powder,black pepper crushed, ginger garlic paste and lemon juice,mix well & marinate for 1 hour.
In grill pan,add butter and let it melt,add garlic and mix well.
Add marinated fish and cook on low flame until done (3-4 minutes each side).
Sprinkle chaat masala,lemon juice & serve.