Spiez or Interlaken restaurants recommendation

Dear all,

I am searching for a trip with Golden Pass Line that I think we will travel further from Zweisimmen to have lunch in Spiez. I remember the town as a lovely one but have no idea about eating places there. Could anyone recommend one? Not so expensive clearly....else in Interlaken but I thought it is very touristy so maybe better to eat in Spiez before reaching Interlaken.

Thanks all.