Blackened Salmon Sandwich Ingredients 1 pound wild salmon fillet (see Ingredient Note), skinned (see Tip) and cut into 4 portions 2 teaspoons blackening or Cajun seasoning 1 small avocado, pitted 2 tablespoons low-fat mayonnaise 4 crusty whole-wheat rolls, split and toasted 1 cup arugula 2 plum tomatoes, thinly sliced 1/2 cup thinly sliced red onion Directions Oil grill rack, preheat grill to high.Rub salmon on both sides with blackening (or Cajun) seasoning. Grill until cooked through, 3 to 4 minutes per side. Mash avocado & mayonnaise in a small bowl.To assemble sandwiches, spread some of the avocado mixture on each roll and top with salmon, arugula, tomato and onion. Back