Slice once horizontally through the pieces of salmon. Insert the cheese and a slice of smoked salmon in between the two pieces and pierce the fish with sticks. Season with pepper. Place the pieces on a buttered oven-proof dish and add a little water to it.
Put it in the oven at 175°C for approx. 20 minutes.
Rinse the spinach thoroughly and let it dry. Cut the fruit into bits and pour a little lemon juice on it.