In a large skillet, heat the olive oil over medium heat.
Season the salmon fillets with salt and pepper on both sides.
Carefully place the salmon in the skillet and cook for about 4-5 minutes on each side, until golden brown and cooked through. Remove from the skillet and set aside.
In the same skillet, add the minced garlic and sauté for 30 seconds until fragrant.
Add the cherry tomatoes and cook until they begin to soften, about 2-3 minutes.
Stir in the fresh spinach and cook until wilted.
Pour in the heavy cream and sprinkle in the Italian seasoning. Stir until combined.
Add the grated Parmesan cheese and stir until the sauce is creamy and smooth. Adjust seasoning with salt and pepper if needed.
Return the salmon fillets to the skillet, spooning the sauce over them, and let simmer for another 2 minutes to heat through.