Do I leave the skin on the salmon?
Either works. Skin-on is great for crispiness and helps the fillet hold together. If you do skin-on, sear skin-side down first and leave it alone until it releases easily. To keep the skin as crisp as possible, return the salmon to the sauce skin-side up (or keep the skin out of the sauce as much as you can).
Can I use jarred sun-dried tomatoes in oil?
Yes, and they are perfect here. Blot them quickly so the sauce does not get greasy, and consider using 1 tablespoon of the tomato oil instead of plain olive oil for extra flavor.
How do I know when salmon is done?
For most fillets, you are aiming for an internal temp of 125 to 130°F for a restaurant-style medium (still juicy), or cook to 145°F if you prefer fully done. If you are pregnant, immunocompromised, or serving someone who needs fully cooked fish, go with 145°F. Visually, the salmon should flake easily and look mostly opaque with a slightly translucent center (for medium).
My sauce got too thick. Did I ruin it?
Nope. Add a splash of broth, pasta water, or even plain water and whisk over low heat until it looks glossy again.
Can I make it dairy-free?
You can try full-fat coconut milk plus a dairy-free Parmesan alternative, but the flavor will shift. Still good, just different. If you do this, add a squeeze of lemon at the end to brighten it.
Can I swap the Parmesan?
Yep. Pecorino Romano works (saltier, sharper), so taste before adding extra salt. For the smoothest sauce, use freshly grated cheese. Pre-shredded can melt a little clumpy.