Cut the chanterelles into recognizable pieces and sauté in a knob of butter, season with pepper and salt, and add the grated garlic, let it cook for a moment, then add the spinach. Keep a few leaves aside for decoration. Mix in the mascarpone and cream, let it simmer briefly, and finally add the drained salmon, taste, and season again with pepper and salt. If necessary, finish with a bit of lemon zest.
Half an hour before you want to serve; cut the tops off the puff pastry pastries, warm them for about five minutes in a preheated oven at 180°C.
Warm the salmon mixture again and divide it into the warm puff pastry pastries and put the lid on. Finish with the spinach leaves.
Place them on a warm festively decorated platter and serve immediately.