Grind grated coconut, cilantro leaves, mint leaves, green chillies, salt to a thick fine chutney. Thinly slice all the veggies of your choice.
Spread the green chutney on a slice of bread. Place the vegetable slices on the chutney. Sprinkle little pepper powder, chat masala on the vegetable slices. Place another bread slice on top and press it.
Heat a grill pan or sandwich maker or any pan. Roast the sandwiches both sides drizzling little olive oil.