Heat oil in a nonstick pan (low flame). Add onion, spinach and sweet corn

Stir and cook for 3-5 minutes.

In a bowl mix together above sautéed vegetables, salt, pepper and 3 tbsp mayonnaise.

Spread 1 tbsp mayonnaise on a chapatti and place little stuffing on the center of the chapatti. Fold the chapatti in half moon shape and seal the edges.

Repeat the process for remaining chapatti.

Heat butter in a pan. Pan fry calzone from both sides until light brown. Cut and serve hot.