be in (one's) element

To be doing something that one is very comfortable with or proficient in. My mother is in her element in the kitchen and can make just about any dish.

Common Names:

Name	Pronounced	Usage
BoŽIdar	-	Serbian, Croatian, Slovene
Raelene	ray-LEEN	English (Rare)
Venceslao	-	Italian
Chizoba	-	Western African, Igbo
Bastiaan	BAHS-tee-ah:n	Dutch
Gerben	KHER-bən	Dutch