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
Hippolytos	-	Greek Mythology, Ancient Greek
Pankratios	-	Ancient Greek
Fermin	-	Basque
Cambria	KAM-bree-ə (English)	Various
Anatolios	-	Ancient Greek
Macy	['meisi]