Place the cut potatoes in ice-cold water and soak for 30 minutes. Drain, rinse, and dry extremely well with towels. The potatoes must be dry before frying. Wet potatoes spit oil and fry badly. The cold soak draws out excess surface starch that would otherwise cause the fries to stick together and brown unevenly across the two separate fries this recipe calls for.

Heat the olive oil in a saucepan over medium-low heat. Add the minced garlic and cook for 30–45 seconds, just until fragrant. Do not brown it. Add the crushed tomatoes, dried oregano, salt, and black pepper. Simmer uncovered for 15–20 minutes, stirring occasionally, until slightly thickened and no longer watery. Taste. Add a small amount of sugar only if the tomatoes are too sharp. Turn off the heat and stir in the ribboned basil. The sauce should be bright, red, and spoonable, not thick like paste. Adding the basil only once the heat is off preserves its bright, fresh aromatic quality — basil cooked directly in a simmering sauce tends to darken and lose much of that fresh character.

If the chicken breasts are uneven, slice and pound them into wide cutlets about 6–8mm thick. Season both sides with salt, black pepper, garlic powder, and oregano. Do not leave the cutlets thick. Thick chicken burns outside before cooking through and makes a clumsy milanesa. Pounding to an even thickness matters more here than in many other preparations, since this cutlet fries relatively quickly at a fairly high temperature — any thick sections simply won't have caught up to doneness by the time the breading outside is properly golden.

Set up three shallow dishes: flour in the first, eggs mixed with milk and Dijon mustard if using in the second, and breadcrumbs mixed with Parmesan if using in the third. Coat each cutlet lightly in flour, shaking off excess. Dip into the egg mixture, then press firmly into the breadcrumbs until fully coated on both sides. Rest the breaded cutlets on a rack or tray for 10–15 minutes. This helps the coating hydrate and stick during frying. The standard three-stage breading sequence works because each layer gives the next something to grip — a light flour dusting first gives the wet egg something to cling to, and that egg layer in turn is what the dry breadcrumbs adhere to; skipping or shortchanging any one stage weakens the whole coating's hold on the chicken.

Heat neutral oil to 150°C. Fry the potatoes in batches for 5–6 minutes, until cooked through and pale blond but not browned. Transfer to a rack and let cool for at least 10 minutes. This lower-temperature first fry is calibrated to cook the potato's interior through gently, without the surface browning and setting a crust too early — that crust-building is deliberately saved for the second, hotter fry.

Heat 1–1.5cm neutral oil in a wide skillet to 170–175°C. Fry the breaded cutlets in batches for 2–3 minutes per side, until deeply golden-brown and crisp. Transfer to a rack. The chicken should reach 74°C internally. Do not stack the cutlets or the crust will steam and soften. A single, uncrowded layer on the rack is just as important as the frying stage itself — stacked cutlets trap steam released from the hot chicken beneath the crust above, softening exactly the texture the frying just built.

Place the fried cutlets on a baking tray. Spoon tomato sauce over each cutlet, leaving some crispy breadcrumb edges visible. Add 2 slices of smoked ham per cutlet, then top each with 50g mozzarella. Broil or bake at 220°C for 4–6 minutes, until the mozzarella is melted, bubbling, and lightly browned in spots. Do not overload with sauce. Too much sauce turns the breadcrumb coating soggy. Leaving some breadcrumb edges deliberately uncovered by sauce is a genuine protective measure, not just a visual choice — those exposed edges stay crisp throughout the broiling stage, giving the finished cutlet a textural contrast between crisp border and softer, sauced centre.

Increase the oil to 185°C. Fry the potatoes again in batches for 2–4 minutes, until golden, crisp, and firm at the edges. Transfer to a rack and salt immediately while hot. This second, hotter fry is what builds the genuinely rigid, crisp exterior the fries need to hold up on the plate beside a sauced, cheese-topped cutlet.

Place one Milanesa Napolitana on each plate with a generous pile of fries beside it. Scatter fresh parsley over the cheese and fries. Serve immediately while the cutlet is crisp at the edges, the cheese is melted, and the fries are hot. This dish has essentially no holding window once assembled — steam from the hot sauce and melted cheese continues softening the breading underneath even after it comes out of the broiler, so serving without delay is what preserves the crisp edges as long as possible.