In a bowl, mix 250 ml milk, 3 tablespoon mustard, 1 pressed garlic clove, salt, and pepper. Add the 4 chicken schnitzel, cover, and refrigerate for at least 1 hour (preferably overnight).
In a deep plate, mix 8 tablespoon grated cheese, 4 tablespoon flour, and 2 tablespoon herbs.
Remove schnitzel from the marinade and coat each piece in the cheese mixture. Place them on a baking sheet lined with baking paper.
Bake in a preheated oven at 180°C (356°F) for 35 to 45 minutes, until the chicken reaches an internal temperature of 74°C (165°F).