1. Place each salmon fillet on a separate sheet of aluminum foil.
2. Slice the tomatoes and mozzarella into thin slices.
3. Lightly season the salmon with salt and pepper.
4. Arrange on each salmon fillet, alternating slices of tomato, mozzarella, tomato, etc.
5. Finely chop the olives and garlic cloves, sprinkle them over the two salmon fillets; add a little salt, pepper, and sprinkle with herbs.
6. Pour the equivalent of 2 teaspoons of olive oil over each salmon fillet.
7. Fold each aluminum foil into a papillote and place them in a gratin dish.
8. Bake in a hot oven (210°C/425°F) for 35 minutes, the salmon is cooked when the skin has lightened.
9. Serve with fragrant basmati rice and a green salad (to which you have added a little onion).