In a large skillet, heat the olive oil over medium heat. Add the minced garlic and red pepper flakes, sautéing for about 1 minute until fragrant.
Pour in the crushed tomatoes and add the dried oregano. Season with salt and pepper. Bring the sauce to a simmer and let it cook for about 10 minutes, stirring occasionally.
While the sauce simmers, season the salmon fillets with salt and pepper.
Carefully place the salmon fillets into the sauce, skin-side down. Cover the skillet and cook for about 8-10 minutes, or until the salmon is cooked through and flakes easily with a fork.
Once the salmon is done, drizzle the lemon juice over the fillets and sprinkle with fresh parsley.
Serve the salmon over cooked pasta, spooning extra sauce on top.