METHOD
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prepare the chicken
Cut the chicken breasts into small, approximately 2 cm (3/4-inch) cubes. Place them in a bowl and season with salt, pepper, and garlic powder. Drizzle with a teaspoon of olive oil and toss well to coat the chicken evenly with the seasonings.
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sear the meat
Place a large skillet over high heat. Add a tablespoon of olive oil and the chicken. Cook for 4–5 minutes, stirring occasionally, until the chicken is golden brown. Clean the leek, cut it in half lengthwise, and slice it thinly. Add it to the chicken and cook for another 2–3 minutes, until slightly softened.
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sauce
Add the mustard to the chicken and leek mixture and stir to combine. Pour in the white wine and cook for 1–2 minutes, allowing the alcohol to evaporate. Then add the heavy cream and water or chicken stock. Stir well and simmer gently for another 5 minutes, until a rich, creamy sauce forms. Season with additional salt and pepper to taste, if needed.
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dressing
In a large bowl, whisk together the eggs, sour cream, flour, and 40 g of grated Parmesan cheese. Season with salt and pepper and mix well until smooth and free of lumps.
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casserole bake
Prepare a large baking dish, approximately 20 x 30 cm (8 x 12 inches). Assemble the casserole in several layers. Start by spreading one or two generous spoonfuls of the sauce over the bottom of the dish. Tear the mlinci into large pieces and arrange them over the sauce, covering it completely. Pour over some hot chicken stock and add a small amount of the prepared sour cream mixture. Continue layering the chicken mixture, mlinci, and remaining ingredients until everything is used up. Finish by pouring over the remaining sour cream mixture (about half should be reserved for the top) and sprinkle with the remaining grated Parmesan cheese.
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bake and serve
Preheat the oven to 180°C (350°F). Place the baking dish on the middle rack of the preheated oven and bake for 35–40 minutes, or until the mlinci are tender, the chicken is fully cooked, and the top is golden brown and crispy. Cover the baking dish with parchment paper and aluminum foil for the first 25 minutes, then uncover and bake for the remaining time. Remove the Chicken and Leek Mlinci Casserole from the oven and let it rest for about 5 minutes before serving. Divide among plates and serve with a fresh seasonal salad.