Sprinkle salmon with salt. In a large skillet heat 1 tablespoon oil over medium-high heat. Add salmon. Cook for 4 to 6 minutes per 1/2-inch thickness of fish or until fish just flakes when tested with a fork, turning once. Transfer to a serving platter. Cover; keep warm.
For tomato pesto, add remaining oil to skillet. Add onion and dried tomatoes; cook and stir for 3 to 4 minutes or until tender. Stir in cherry tomatoes, olives, basil, and crushed red pepper. Stir to heat through. Season to taste with salt.
Spoon tomato mixture over salmon. Top with additional fresh basil and serve with cooked pasta and pepperoncini peppers, if desired.