Filling:
Devein shrimp and cut into small pieces. Cut bamboo shoots or hearts of palm into thin long strips.
Saute garlic, diced onion, shrimp and ground pork for about 10 minutes. Then add bamboo shoots or hearts of palm, salt and pepper to taste, then cook for another 5 minutes. Drain well.
On a plate, lay wrappers flat, place a segment of lettuce leaf on wrapper, then put about 2-4 tbsp. of filling on top of lettuce and roll wrapper. Seal with a little water along the edge and place edges down. Serve with lumpia sauce.
Wrapper
Mix all the ingredients until very smooth. Lightly grease a non-stick pan and heat. Brush mixture onto pan. When dough starts to come away from the pan, lift wrapper out carefully. It will not lift out if mixture is not done. Do not cook other side.
Sauce:
Combine cornstarch, sugar, soy sauce and water. Cook 5 minutes over low heat, stirring constantly to prevent lumps. When done serve with the wrappers.