Pasar Ah Poong or Abung (which means floating in English) is a medium sized food market/ open air food court on the bank of a river in Sentul, just near the large Islamic centre as you get off the toll road from Jakarta.
Grab a table, purchase a prepaid card then get ordering and eating.
There are small boat rides out the back to keep your children amused and sitting by the bank of the river is a lovely way to spend a lazy afternoon.