。
She poured the milk into a bowl.
Literal
[topic-は] milk [object-を] bowl [into-に] poured.
注ぐ ('pour') takes に for the destination ('into') and を for the substance poured. Note ボール is a katakana loanword that cleanly conflates two English words: 'bowl' (the vessel) and 'ball' (the round object) — context disambiguates, and here ボールに ('into a bowl') clearly means the dish. Japanese has a native word 鉢 (はち) for bowls but in everyday food contexts ボウル/ボール is more common; written ボウル to disambiguate from 'ball' is also seen.