Season salmon generously with salt and pepper. Heat olive oil in a skillet over medium-high heat. Sear salmon 3–4 minutes per side until golden and just cooked through. Remove to a plate and set aside.
Reduce the heat to medium. In the same pan, add minced garlic and sauté for about 30 seconds until fragrant.
Pour in the wine or broth, if using. Scrape up any browned bits from the bottom. Let it simmer for 2–3 minutes to reduce slightly.
Stir in heavy cream, cream cheese, and Parmesan. Whisk until the sauce is smooth and slightly thickened, 3–5 minutes.
Add sun-dried tomatoes, Dijon mustard, and lemon juice. Simmer 1–2 minutes to marry the flavors. If it thickens too fast, splash in a splash of broth.
Return salmon to the pan, spoon sauce over the fillets, and heat through for 1–2 minutes. Sprinkle with parsley and optional greens just before serving.
Taste and adjust salt and pepper. Serve immediately with your favorite sides. Yes, now is the moment to shine.