'The man from Solo' (a city in Java Island, Indonesia) is an excellent budget Indonesian restaurant close to the start of Al Balad. It's been wholly claimed by visiting Indonesian pilgrims who arrive in hordes and will tell anyone who listens that it's the closest taste of home in all of Saudi Arabia.
We're no experts, but are inclined to agree – just avoid the lunch buffet (10am to 2pm) if you want a quiet meal.
The restaurant is on the 1st floor, above several clothes outlets.