Peel the skin off the duck breasts, cut them into thin strips and fry them in the pan until golden brown. Remove and drain on kitchen paper. Put aside.
Briefly fry the duck breasts in the duck fat and place in the oven for 10 minutes. Take out the meat and wrap it in aluminum foil.
Quarter and core the bell pepper and cut into small cubes, also cut the shallots and garlic into small cubes. Pluck herbs from the stems.
Add the sherry, cream and herbs and reduce until creamy. Season with pepper and salt, add the duck and diced paprika and heat briefly. Mix with spaghetti and garnish with the crispy strips of skin.