Instructions:

• Cut the potatoes into French fries and fry them in oil over medium-high heat, season with salt and paprika.
  Cut the sausages (Chistorra Mr. Tango) into large pieces.
• In a preheated skillet, add a bit of butter and oil.
• Add the sausages and sauté them.
• When they are browned, add 1 glass of soda and then 2 tablespoons of ketchup.
• Add salt and pepper.
• When they are slightly caramelized, add more soda, reduce the heat, and let them caramelize completely.