Oh roasting pan for sure! We have this and cook in the big pot pretty much all the time on the stove. The frypans are just too small and this does the same job, but keeps all our veggies in!
https://www.robinskitchen.com.au/product/baccarat-id3-roaster-~-grill-34cm-x-24cm
That long burner would be perfect for it.