Yeap. Joining in the Hotpot Crew. Its absolutely hotpot.
Its a family meal you're supposed to share.
Its something Nono would never had had a chance to have with her family, so its something she would associate with "a happy family".
Its "made" on the spot, with the ingredients laid out and soup boiling in a pot, so the reaction matches.
Its "commoner" enough to be impactful as something a royal would never even consider.
Its hotpot.
There will be brown mushrooms with the crosscut, roughly cut potatoes, slices of thin meat, lost of green onions and other veggies. Trust me. Its the classic japanese hotpot trope.