"Breakfast and lunch?"
Translation:Ontbijt en middageten?
Yes @simplyloki. Middageten is more about the time of day than lunch which is more the actual food. They can be and are used interchangeably though. You can't really mess up.
But typical usage is:
Ik ben aan het lunchen
Ik heb nog geen middageten gehad.
I'm having my lunch*
I haven't had anything to eat yet this afternoon.
*(can you say I'm lunching? Not common I think, unless with an addition perhaps)