guhk chā sīu bāau
焗 is baked, and 叉燒包 is BBQ pork bun.
Also known in Chinese as 叉燒餐包 (chā sīu chāan bāau in Cantonese, chā shāo cān bāo in Mandarin), where 餐包 is a western-style dinner roll, literally dinner bao, so it's bbq pork dinner roll.
A baked version of the BBQ pork bun, with the same Cha siu filling but a smooth bao that's baked to a toasty brown and typically glazed on top with honey.