I'm serving izakaya food to our Canadian guests.

Literal

Canada [possessive-の] guest [to-に] izakaya cuisine [object-を] serving.

お客様 uses the honorific お + 客 'guest' + 様 (respectful suffix). サーブ is a loanword from English 'serve,' used as a する-verb. 居酒屋料理 'izakaya cuisine' — food from a Japanese-style pub. The sentence describes a cross-cultural hospitality scene.