one specialty can be found at untung usodo's take-away stand.d of sweet or savory spring roll. today's lumpia version was created when untung usodo's chinese grandfather and his indonesian grandmother combined their recipes more than 100 years ago. now, their grandson runs a snack bar and is sharing the lumpia recipe with us. >> we wash and cook the bamboo shoots until they're soft at home, then we bring them here and mix them with shrimp and eggs to make the filling. reporter: it all goes into a large wok, where it's quickly stirred and fried. then the mixture is spread onto a length of dough. now they have to work quickly. it's very popular with guests. >> we produce 500 lumpia on weekdays, and twice as many on holidays. reporter: lumpia are served fresh or fried -- the price stays the same. before the coronavirus pandemic, customers used to line up at the stand and eat right here. the lumpia were served with a savory coconut sauce. today, the lumpia spring rolls are only sold in practical to-go boxes. >> every time i go to semarang, i have so