For the Parmesan crust, mix the egg with the cheese, breadcrumbs, and finely chopped fresh herbs until well combined. Place the mixture between two sheets of parchment paper and roll out with a rolling pin to a thickness of 0.5 cm (0.2 inch).
The chicken
Season the chicken breast with salt and pepper and fry on both sides in a pan over a high heat. Then add the Parmesan crust over the chicken and place on a baking tray.
Halve the cherry tomatoes and place them on the baking tray around the chicken. Season with salt and pepper.
Place the tray in the oven and cook for 10 to 12 minutes at 180°C (355°F), until the chicken is firm to the touch and the crust becomes golden brown.
Serve with creamy mashed potatoes.
Mashed potatoes
Clean and cut the potatoes into cubes and boil them in salted water. When they are cooked throughout, drain and crush them with a masher. Incorporate the butter, making sure it melts completely. Then add the milk and a pinch of salt if necessary, kneading until you get a fine and fluffy mash.