1. Cut the meat into small cubes and cook it quickly (rare). Set aside.
2. Slice the mushrooms and cut the drained quenelles into small pieces.
3. Melt the butter in a large pot, add the flour and cook while stirring for 3 minutes.
4. Then, pour the chicken broth into the blond roux and bring to a boil.
5. Add the meat, mushrooms, white wine, pepper, and nutmeg. Continue to heat while stirring constantly.
6. Gently incorporate the quenelles and stir.
7. In a separate bowl, mix the egg yolks with the cream, then pour this mixture into the pot while stirring. Heat without boiling for 5 minutes.
8. Preheat the pre-baked crusts in the oven at 180°C. When they are hot and very dry, remove them from the oven and remove the lids.
9. Place the crusts on individual plates (accompanied by rice or pasta). Fill them with the sauce filling and place the lids on top. Serve immediately.