Cut banana leaves into 6x8 inch sheets.

Briefly pass each sheet over an open flame to make it soft and pliable. Set aside.

In a bowl, combine the coconut milk and violet liquid food color. Mix well.

In a large bowl, pour the glutinous rice flour and gradually add the colored coconut milk.

Mix with your hands, breaking up any clumps, until a sticky dough forms.

Place 2 to 3 tablespoons of the dough in the center of each banana leaf sheet.

Roll tightly into a log shape and fold both ends to seal.

Repeat the process with the remaining dough.

Arrange the wrapped logs in a steamer.

Steam for 20 minutes over medium heat.

Turn off the heat and let it rest for 5 minutes without opening the lid to finish cooking.

Carefully remove each log from the banana leaf and place onto a serving platter.

Brush with margarine, then top with freshly grated coconut, brown sugar, and grated cheese.