Bukit Gambir is under 2 hours from KL and 1.5 hours from JB, so it could work as a lunch stop from either direction. It is a sizeable town, comparable to Yong Peng, and offers quite a few dining options during lunch time. It is very near Panchor, and easily accessible from the Toll booth.
I Googled and found a restaurant that has unfortunately already shut down, but just behind to it, there is a Tze Char restaurant that probably has been operating for a long time – Bee Hiong Guan. It is housed in a purpose-built building, and the high ceiling made it feel breezy and airy. It is very clean too.
The dishes were very good. The portions were rather big too. All in, 3 dishes, 2 plain rice plus Chrysanthemum tea came up to RM40 (S$13.50). I would recommend coming here for an inexpensive meal, if you are looking for better-than-hawker-stall food.
The restaurant is located just next to Chian Kuo primary school. If you’re looking for old-school hawker food, you can check out the stalls across the road just slightly further down.