Stir in the Tuscan spice blend and a pinch of salt, followed by tomato paste and sun-dried tomatoes. Cook for another minute.
Lower the heat to medium-low. Slowly add the heavy cream, stock, white wine, and lemon juice. Stir well and let it bubble gently for 1–2 minutes.
Add the parmesan cheese, whisking until melted and the sauce thickens (about 2–3 minutes).
Stir in the kale and let it soften. Add the roasted salmon fillets and spoon the sauce over the top. Simmer for 5–6 minutes until everything is well coated and the salmon is tender.
Serve the salmon with your favorite sides—gnocchi, rice, pasta, or roasted vegetables. Garnish with extra parmesan for added flavor.
Notes
For a homemade Tuscan spice blend, mix dried basil, oregano, thyme, and red pepper flakes.