Grate the carrot with the help of a grater. Keep aside.Butter the bread slices and keep aside.
For the green layer, mix the mint chutney, paneer and salt in a bowl, mix well and keep aside.
For the orange layer, mix the carrot, mayonnaise and salt in a bowl, mix well and keep aside.
Place the buttered bread slice on a clean, dry surface and spread the green mixture on top and spread it evenly.Place another bread slice with the buttered side facing downwards and spread the orange mixture over it and spread it evenly.Put the third bread slice on top with the buttered side facing downwards.
Repeat steps 5 to 7 to make one more sandwich.Cut each sandwich into 2 pieces and serve immediately with tomato ketchup.