Preheat oven to 220 degrees Celsius.
Bring a pot of water to a boil. Boil green beans 3-5 minutes, then carefully drain (you can also use the microwave for a quick steam).
Toss green beans with 1 tsp olive oil and season with salt and pepper to taste, and put them in the centre of a big piece of foil. Season both sides of salmon with salt and pepper.
Layer salmon over green beans and then spread 1 Tsp of pesto over top.
Quarter the tomatoes and season lightly with salt. Spread over each salmon fillet.
Wrap sides of foil in and roll and crimp edge to seal, then wrap ends upward to seal.
Place the parcel on a baking sheet and bake in preheated oven until salmon has cooked through, about 20 (cook time will vary depending on thickness of salmon).