To make Red Pepper Relish,stir together bell peppers, parsley, 1 tsp of lemon zest, lemom juice, 1 tsp of olive oil and garlic in a small bowl and set aside.
Combine salmon, bread crumbs, scallions, egg white , pepper, remaining 1 tsp lemon zest in med bowl and stir gently to mix. Divide into 8 equal portions( about 1/3 cup each) shape into cake.( 2 1/2-icnhes in diameter) pressing to maintain shape.
Heat 1 tsp remainnig oil in large nonstick skillet over meduim heat. Add cakes and cook 3 to 4 minutes on each side or until golden brown. Repeat with remaining 1 tsp of oil and remaining cakes. Serve with Red Pepper Relish.