香腸 is Chinese sausage (or actually fragrant sausage, as 香 is fragrant and 腸 is sausage). 飯 is rice (cooked), so 香腸飯 is Chinese sausage rice or, appetizingly, fragrant sausage rice.
About This Dish
Taiwanese sausage on white rice. Taiwanese sausage is similar to Cantonese sausage but plump instead of dried.