Preheat the oven to high broil. If the oven does not have a broil setting, preheat to 500 degrees.
Once the oven is preheated, place a broiling pan or cast iron fry pan into the oven for about 10 minutes. A cast iron pan will work best.
When the pan is very hot, carefully remove from the oven and place the salmon in the pan skin sided down. Season with the red pepper and salt. Return the pan to the oven and cook for about 8 minutes or until firm and flaky.
Remove from the oven. If desired, serve with a splash of fresh lemon juice.