Brush 1 wrapper with egg wash. Put a half banana inside wrapper with 1 Tbsp. brown sugar and any optional ingredients as desired. Roll, folding in ends to seal banana. Repeat with remaining wrappers and filling.
In a wok or heavy pot, heat the oil to 375. Deep fry lumpia til golden, about 30 to 40 seconds. Drain on paper towels. Cut crosswise and serve with coconut ice cream.