There's hardly any food in the refrigerator.

Literal

Refrigerator [in-には] hardly food [subject-が] does-not-exist.

ほとんど~ない ('hardly any, almost none') is the negated form of the adverb ほとんど ('almost, nearly, mostly'). With a negative predicate, it flips to 'hardly, scarcely.' ありません is the polite negative of ある.