。
She made vegetable soup last night.
Literal
She [topic-は] last-night vegetable soup [object-を] made.
昨晩 (さくばん) is a slightly more formal alternative to 昨夜 (さくや) for 'last night' — both share the same meaning but 昨晩 has a writing-flavored register. 野菜スープ stitches together the native 野菜 ('vegetables') with the loanword スープ (soup) — a typical Japanese pattern of mixing scripts within compound concepts. Vegetable soup is part of the vocabulary of Japanese 洋食 ('Western-style cuisine'), distinct from traditional Japanese 汁物 ('soups, broths') like 味噌汁 or お吸い物.