Puff pastry with speck and fontina cheese

Preparation:

Preparation: Clean the mushrooms well and cut them into 2-3 mm slices. thick: you have to get about 24 regular slices (you will keep the scraps for another preparation). Heat a cast iron grill pan over high heat and grill the mushrooms on both sides until golden brown. At this point, prepare some sandwiches by superimposing a slice of mushroom, half of speck, a slice of fontina cheese and one of mushroom. Complete with another layer of speck, fontina cheese and mushrooms. Secure each sandwich with a wooden toothpick and place it in a bag of parchment paper or aluminum foil. Pour a teaspoon of cream, sprinkle with salt and a little chopped rosemary, then close the packets. When all the packets are ready, line them up in a baking dish and put them in the preheated oven at 200 degrees for 10 minutes. Serve the small mille-feuilles immediately in their packets, perhaps with a nice salad around them.