Season to taste. Cool before wrapping.
How To make lumpia wrappers:
Mix egg, water, cornstarch and salt thoroughly until smooth. Take about lA of batter to make each crepe (piece of wrapper). Brush some oil on a non-stick pan. Spread the batter thinly by turning the pan around. Cook only one side of the crepe over low heat. (Don’t keep the crepe too long on the pan as it will be toasted. When it turns slightly brown or small bubbles appear on the surface, it’s cooked.) Lift crepe off using a wide spatula, and place on wax paper. Stack cooked crepes with wax paper between them.
How to make Fresh Lumpia Sauce:
Dissolve cornstarch in water and soy sauce. Put brown sugar in a saucepan. Caramelize by stirring the sugar continually until totally melted. (Don’t scorch the sugar.) Add some water and simmer until the caramel is dissolved. Add cornstarch dissolved in water and soy sauce. Stir until mixture becomes smooth and transparent.
How to make Lumpia:
Put 2-3 tablespoons of filling in lumpia wrapper. Roll wrapper and seal. Serve with sauce and finely chopped peanuts.