1. Cut two squares of parchment paper or aluminum foil.
2. Place the salmon on top, brush it with olive oil.
3. Arrange the scallops around it.
4. Slice the tomatoes and place them on top of the salmon.
5. Season with salt, pepper, and Herbes de Provence.
6. In a bowl, mix the heavy cream with the fish stock (you can add a teaspoon of mustard for a stronger flavor). Pour this mixture into the parchment paper, seal it, and bake for 15 minutes at 210°C (425°F).
7. For an even more tender result, you can prepare the parchment packets without the cream+stock mixture and let them marinate like that for 2 hours, then add the mixture just before baking.
8. Serve with rice, vegetables, or fresh tagliatelle pasta.