Put all the ingredients except oil and chaat masala into a zip-lock bag and marinade in the refrigerator for about 5-6 hours or overnight.
Place the pieces on a greased foiled lined baking sheet.
Drizzle oil all over the pieces and grill on medium high for about 20 minutes or until Salmon is just cooked and has the beautiful grill marks.
Arrange on some salad leaves, red onions and lemon wedges and sprinkle some chaat masala all over.Enjoy!