Simple past tense and past participle form of the verb “mash”.
More precise classification: adjective derived from a past-participle form.
The mashed potatoes were served with gravy.
Размятый картофель подавали с подливкой.
The mashed consistency of the soup made it easy to eat.
Пюреобразная консистенция супа делала его легким для употребления.