Idun Tomato Ketchup, packed with tomatoes and completely free of preservatives. Idun actually uses 2 kilograms of tomatoes to make 1 kilogram of tomato ketchup. The high content of sun-ripened tomatoes is the secret behind the fresh, delicious tomato ketchup flavor and the unique consistency that makes Idun Tomato Ketchup the perfect topping for hot dogs. Norway’s favorite since 1960.