Cook the bacon in a frying pan until well browned. Place on absorbent paper, let cool. Remove almost all the fat that remains but leave a teaspoon.
Add the oatmeal and water to the same pan. Bring to a boil over high heat. Once it has boiled, lower it to medium heat and cook for 10 to 12 minutes, after that time all the water should be evaporated. Cook until there is no more water and let stand for 10 minutes.
After the time has passed, mix with a fork and season with salt, pepper and add the cayenne pepper (optional) to give it a spicy touch.
In a bowl mix the dressing ingredients, add the cabbage or kale and smooth it out for 1 minute.
Add the apple, Parmesan cheese, chopped bacon, chopped walnuts, dried cranberries, and crispy oats. Mix well, season with salt - pepper and enjoy.