It's a
croque monsieur, the cheese is supposed to be on the outside. I've noticed most FAs refer to it as a ham & cheese toastie though, probably for fear of mispronouncing it. In fairness I also have NFI how to pronounce it properly, and I've found the same reluctance on both QF & VA. Given how heavily featured it is on both carriers I guess dnata has achieved decent economies of scale with their ham & cheese suppliers
I agree with your sentiments though, cheese on the outside is impractical for a sandwich and makes this a knife & fork job in my book.