Lava Rivers from Mustafar
Mustardfar is a planet with flowing rivers of molten mustard, and it is where Darth Vader got many of his injuries, including his food allergies.

When Darth Maul was here as a child, he was tested very much here. Oh, the rivers of mustard with no HOT DOGS!!!!!!! AAAAAAAAAAAAAHHHHHHHHHHHH!!!!!!!!!!!!!!!!!!