Poke pieces of uncooked long pasta in the sausages. If you're using regular sized sausages, I recommend using Pretz (savory stick shaped snacks made by Glico).
Coat the sausages on pasta sticks with the batter.
Then just deep fry them.
They're very small so they are cooked in no time, so pay attention. Turn them around a bit while cooking so that they fry evenly.
I recommend these for special occasion bentos like sports festivals and school outings.
You can use the same method using vegetables or cheese coated in batter.