mashed potato
US /ˌmæʃt pəˈteɪ.təʊz/
UK /ˌmæʃt pəˈteɪ.təʊz/

1.
potatoes that have been boiled and crushed until they are smooth
:
•
I love to eat steak with mashed potatoes.
•
The chef prepared a side of creamy mashed potatoes.
potatoes that have been boiled and crushed until they are smooth