Ingredients for 4 people
For the filling:
2 tbsp olive oil
1 small onion or 1 shallot, finely chopped
500 g button mushrooms, cleaned and minced
150 g smoked ham (or smoked bacon), diced
2 tbsp butter
2 tbsp flour
360 ml warm milk (whole or semi-skimmed)
50 g grated cheese (Emmental, Comté, Gruyère or Parmesan)
2 tbsp chopped fresh parsley
Salt, freshly ground black pepper
A pinch of nutmeg (optional)
For assembly:
1 roll of pure butter puff pastry (300 to 350 g)
1 egg yolk + 1 teaspoon water for egg wash
Preparation:
1. Prepare the filling
In a large skillet, heat the olive oil over medium heat. Sauté the onion or shallot until it becomes translucent.
Add the mushrooms and cook until the water has completely evaporated. Season lightly with salt.
Stir in the ham and sauté for a few minutes.
Add the butter, then dust in the flour. Toss to coat the ingredients well.
Gradually pour in the warm milk, stirring constantly until you get a smooth sauce.
Off the heat, stir in the grated cheese, parsley, pepper and, if desired, a pinch of nutmeg.
Allow the filling to cool before assembly.
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