Sonic does something like this with tator tots/fries or frito chips with chili and cheese and anything else you can put on a burger or hotdog that you want, that there looks like scraps that fell out of subs they were making throughout the day
I miss sonic. Ive only seen like one since I moved out west.
I also miss something called Cookout. Its a family driven small chain in georgia/florida. Probably the best small business burger and shake ive ever had. They have a huge menu too.