@skinnylatte It depends on what is considered 'Indonesian' isn't it? Because there is a lot of Achehnese influence in the Northern Malay states due to migration. But because it's so integrated, it's just considered 'Malay food'. The borders are more recent than the cuisine.
North of Malaysia is an intersection Thai-Acheh-Hokkien-Hainan-Tamil-Old Kedah food.