Heat olive oil in a large skillet over medium heat.
Season the salmon fillets with salt and pepper on both sides. Once the skillet is hot, add the salmon fillets skin-side down and cook for about 4-5 minutes, until nicely browned. Flip and cook for another 3-4 minutes until the salmon is cooked through. Remove from skillet and set aside.
In the same skillet, add minced garlic and sauté for about 30 seconds until fragrant.
Add the halved cherry tomatoes to the skillet and cook for 2-3 minutes until they begin to soften.
Sprinkle in the chopped spinach and stir until wilted.
Pour in the heavy cream, then add the grated Parmesan cheese and Italian seasoning. Stir until the cheese is melted and the sauce is creamy.
Add lemon juice, stirring to combine, then return the salmon fillets to the skillet. Allow the salmon to heat up in the sauce for another 2 minutes.
Taste and adjust seasoning with salt and pepper as needed.
Notes
Serve on a warm plate with extra sauce and fresh basil. Pair with garlic bread or pasta.