Questions & Answers about Ég kann að elda einfaldan kvöldmat.
In this sentence, að is the infinitive marker, similar to English to in to cook.
- kann = can / know how to
- að elda = to cook
So Ég kann að elda literally means I know how to cook.
This is a normal pattern with kunna when it means knowing how to do something. English often drops to after can, but Icelandic uses að here.