煮 (Kanji for simmer/stew)

Onyomi

SHA

The professional cook SHALL always stew food using fire, not a damn microwave.

( を ) に＊る	boil (potato) or simmer (a sauce or stew or onabe) ★★★☆☆
( が ) に＊える	it gets boiled or cooked ★☆☆☆☆

煮物(にもの)

boiled food ☆☆☆☆☆ KUNKUN
煮 (simmer/stew) + 物 (animal / thing) = 煮物 (boiled food)