Soak bread in cold water. Dab meat dry, season with salt and pepper. Fry well all around in hot oil. Take out.
Peel and chop the onion. Wash and finely chop the parsley. Squeeze the bread well. Knead everything well with minced meat, ground pork, mustard, tomato paste, 1 teaspoon salt and egg.
Shape the mince on a piece of baking paper into a rectangular flat plate (approx. 25 x 30 cm). Place the fillet on top and roll up. Put the minced meat roll in a box or pie tin (25 cm long; approx. 1 l capacity), press it slightly into shape.
Bake in the preheated oven (electric oven: 225 °C/circulating air: 200 °C/gas: see manufacturer) for approx. 15 minutes. Turn down the temperature (electric oven: 200 °C/circulating air: 175 °C/gas: see manufacturer) and bake for another 40-45 minutes.
Warm the jelly slightly and stir until smooth. Spread it on the mince pâté while still hot. Let it cool down.