、。
She makes meals to suit my taste.
Literal
She [topic-は] my preference [to-に] match-and, food [object-を] makes [for-me-てくれる].
好みに合わせる literally means 'match to (someone's) preference' — 合わせる is the transitive partner of 合う ('to fit / match'), so this verb actively adjusts something to fit. The te-form chains it into the next clause: 'matches and then makes,' i.e. 'makes in a way matched to.' The benefactive ~てくれる adds the speaker's gratitude that the cooking is done as a favor. 料理を作る ('make food / cook') is the more conversational alternative to the bare verb 料理する, which is also valid.