Combine Old Bay, brown sugar, and 1/2 teaspoon salt; rub all over salmon fillets and place, skin side down, on foil-lined rimmed baking sheet. Broil on high 5 to 6 minutes or until just cooked.
Toss cabbage, cilantro, green onions, balsamic, and 1/4 teaspoon salt. Serve salmon on top of slaw.
Serving Size 4