Salam, this is very delicious product and presently sold at our region. I found Halal certificate released by Halal Certification Services GmBH for Wander AG, the producer of Ovomaltine and Ovaltine. Some of their products have been halal registered, please see, and you can enjoy the food.
Also, please have a look at the active period of the certificate, and keep updating the certificate renewal in the future.
certificate link: Halal Certificate Wander AG: Ovomaltine
This question started from Malaysia, same question is relevant too in Indonesia !
look at below link !
Salam All Sushi Lovers,
Now you have halal sushi Resto at Jakarta. You may check their website: http://sushibar.co.id , and also see below news