Pre-cook the pasta in salted water for about six minutes.
Wash the leek and cut into rings. Press the garlic. Melt the processed cheese in a mixture of broth and milk and season with salt, pepper and paprika powder.
Preheat the oven to 200 ° C (convection 180 ° C).
Heat oil in a pan. Fry the minced meat with garlic and leek rings until crumbly. Drain the pasta and place in a baking dish with the minced beef, leek rings and sauce. Season with salt and pepper again and bake in the middle of the oven for about 30 minutes. Sprinkle the leek casserole with parsley and serve hot.