I might not understand your question, so this may or may not make sense to you. Your sim has to attend the City Living festivals and eat all the spicy foods available in order to 'learn how to make them', in other words for them to show up in the cooking menu. Until your sim eats them they won't show up as options. If that doesn't help, could you try explaining what it is you're trying to do in the game? Are you not seeing City Living or Selvadorada food options when setting up a menu for a restaurant? Are you looking for alien food recipes? If it's the latter, I have no idea, sorry!