Pasta in ruby mixin

american_style.rb

module AmericanStyle
  extend ActiveSupport::Concern
  
  included do
    has_many :american_ingredients
  end
  
  module ClassMethods
    def macaroni_cheese; ... end
  end  
end

italian_style.rb

module ItalianStyle 
  extend ActiveSupport::Concern

  included do
    has_many :italia_ingredients
  end

  module ClassMethods
    def alfredo; ... end
  end
end

pasta.rb

class Pasta
  include ItalianStyle
  include AmericanStyle
end