Pat the salmon dry with paper towels and season with salt and black pepper.
Heat a skillet over high heat and melt the butter. Pan-sear the salmon fillets, starting with the skin side down. Flip the salmon and continue to pan-sear until browned on the surface (the inside may not be fully cooked at this point). Remove the salmon from the skillet and set aside.
Reduce the heat to low in the skillet and add the garlic, sautéing until fragrant. Then add the cooking wine, heavy cream, and sun-dried tomatoes. Turn the heat to the lowest setting to let it simmer.
Return the salmon to the skillet and season the sauce with salt and cayenne pepper.
Add the spinach and lemon juice. Once the spinach wilts and the salmon is cooked through, turn off the heat. Garnish with chopped parsley (or Italian basil) and serve immediately.
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Notes
Skip white wine and use water if you can't consume alcohol.