Mix 150 g flour and salt. Add 1 egg, 1 tablespoon milk and 75 g butter in pieces. Knead first with the dough hooks of the hand mixer, then with your hands to a smooth dough. Grease a tart mould (26 cm Ø).
Roll out the dough on a floured work surface until round (approx. 30 cm Ø). Line a mould with it, press it on, cut off any protruding edges. Place the mould in a cool place for about 1 hour.
Clean, clean and finely chop the mushrooms. Peel and finely chop the onion. Heat oil in a pan. Sauté onion and mushrooms in it. Season with salt and pepper. Peel, wash and finely dice the potatoes.
Mix the mushrooms and potatoes. Grate the parmesan finely. Mix cream cheese, 70 ml milk, 1 egg, parmesan and puree. Season with salt, nutmeg and pepper.
Spread the mushroom mixture on the tart and pour the pumpkin mixture over it. Bake in the preheated oven (electric cooker: 175 °C/ convection oven: 150 °C/ gas: see manufacturer) for 25-30 minutes.
Wash duck breasts, dab dry, rub with salt and pepper. Place them skin side down in a coated pan and fry them over medium heat for about 5 minutes until crispy brown, turn them over and continue frying for about 1 minute.
Place on the fat pan of the oven and cook in the preheated oven (electric cooker: 150 °C/ circulating air: 125 °C/ gas: see manufacturer) for approx. 15 minutes.
In the meantime, melt 1 tablespoon of butter in hot frying fat. Dust with 1 tbsp. flour and stir in. Add red wine and stock. Simmer for about 10 minutes at low heat, stirring occasionally.
Season to taste with salt and pepper. Arrange tart, duck breast and sauce on plates. Serve with broccoli and flaked almonds.