Pre-heat oven to 400.
Line baking sheet with foil.
Salt and pepper salmon fillets.
Place them in a small bowl.
Pour over 1/2 cup of balsamic vinaigrette.
Turn salmon several times to cover well.
Place in the middle of a sheet pan.
Place asparagus and tomatoes on sides.
Drizzle with 1/4 cup of balsamic vinaigrette.
Bake for 12-15 minutes, until salmon is cooked through and asparagus is tender.