noun
food topped with grated yam
Refers to dishes where grated yam (tororo) is poured over rice, soba, or other foods. Common in Japanese cuisine.
山かけそばが大好きです。
I love soba topped with grated yam.
まぐろの山かけは居酒屋の定番メニューだ。
Tuna with grated yam is a standard menu item at izakaya.
とろろ refers specifically to the grated yam itself, while 山かけ describes the dish where it is used as a topping.
Compound of 山 (yama, 'mountain') and 掛け (kake, 'pouring over'), from the appearance of grated yam resembling a mountain on top of the food.