Combine brown sugar, adobo sauce, and salt in a small bowl. Line a baking sheet with foil and spray with cooking spray. Place fish on baking sheet and brush with adobo mixture.
Bake at 450 degrees for 13 minutes or until fish flakes easily when tested with a fork. Sprinkle with onions before serving. Makes 4 servings. Serving size 1 fillet.
Notes
Note: Adobo sauce comes from a can of chipotle chilies. Chipotle chilies can usually be found in the Mexican aisle. You can store the remaining chipotle chilies and sauce in an airtight container for up to one month. Also, I like to use the salmon fillets from Costco because they are prepacked into perfect serving sizes and have the skin removed.Source: Weight Watchers 5-Ingredient Cookbook