Cut the banana into slices and arrange on one slice of vegan bread. Sprinkle chocolate over bananas and top with second slice of vegan bread.
Heat skillet over medium heat. Add about a teaspoon of the margarine to the pan and wait for it to melt. Once the margarine is melted, put the sandwich into the pan. Fry both sides until golden brown and the chocolate is melted.
Enjoy!
Note: This sandwich goes great with a tall glass of soymilk!