Whisk the egg with the milk and mix the breadcrumbs with the pumpkin seeds.
Beat the schnitzel, salt and pepper, then cover each half with 2 slices of bacon and a slice of Gouda cheese. Fold the schnitzel shut and fix it with toothpicks. First turn in the flour, then in the egg-milk mixture and finally in the breadcrumbs.
Fry in plenty of hot oil until golden brown, about 5 minutes per side, always scooping up with the oil.
Serve with rice or parsley potatoes and green salad.