In a small bowl, combine the first seven ingredients. Pour 2/3 cup into a large resealable plastic bag; add salmon. Seal bag and turn to coat; refrigerate for at least 2 hours. Cover and refrigerate remaining marinade for basting.
Drain and discard marinade. Using long-handled tongs, moisten a paper towel with cooking oil and lightly coat the grill rack. Arrange lemon slices on rack. Place each salmon fillet over two lemon slices.
Grill salmon, covered, over medium heat for 5 minutes. Brush with some of the reserved marinade. Grill 10-15 minutes longer or until fish flakes easily with a fork, basting occasionally with remaining marinade. Yield: 4 servings.