Preheat oven to 425F grease a large baking sheet with a neutral oil.

In a large dish, whisk 2 tablespoon soy sauce, 1 tablespoon rice vinegar and 1 tablespoon sesame oil. Add salmon and marinate for 15 minutes.

Meanwhile, in a large bowl whisk remaining soy sauce, vinegar and oil. Toss with broccoli and arrange on the baking sheet. Arrange salmon on sheet.

Roast for 20-25 minutes or until cooked through.