The elf is confused for the first time seeing a metal spoon after I served the food. It is understandable though as I can already imagine them using wooden spoons to eat their food. She obviously hasn't seen a spoon made of metal as she should be living deep in the forest as all elves usually do. Judging from her looks alone, she hasn't been living in a human town or city as she doesn't look like she has been there for once. So seeing a metal spoon for the first time is something she hasn't experienced as shown in her reaction and how much she was talking in elven language with a tone of excitement and curiosity on her tone.