Divide the cheese into 4 different portions. Add a drop or two of the food colour and mix well till the colour sticks evenly on the cheese. Do the same with all the portions using a different colour. Remember to wash your hands at the time of changing colour.

Apply butter on the bread slice. Place coloured cheese on it with alternate colours.

Put some butter on a nonstick pan. Place the prepared bread slice on it. Cover the pan and toast it on medium to low heat till the cheese melts and the bread gets light golden colour at the bottom.