This is the 371st most frequent Swedish word.
enkelt
Simple.
Here, 'enkelt' is used as an adjective to describe the ease of the activity, which is cooking pasta.
Det är enkelt att laga pasta.
It's easy to cook pasta.
In this case, 'enkel' describes the characteristic of the path being straightforward or undemanding.
Vi tog en enkel väg till toppen.
We took a simple path to the top.
Here, 'enkelt' is an adverb, describing how he dressed, emphasizing a straightforward or unadorned manner.