Begin by cooking the gnocchi according to the package instructions. Typically, this involves boiling them in salted water until they float to the surface. Drain and set aside.
In a large skillet, heat the olive oil over medium heat. Add the minced garlic and sauté for about 1-2 minutes until fragrant, but not browned.
Pour in the can of diced tomatoes (with juice) and add the Italian seasoning, salt, and pepper. Let it simmer for about 5 minutes to allow the flavors to meld.
Reduce the heat to low, then stir in the heavy cream and chopped basil. Allow it to simmer gently for another 3-4 minutes, stirring occasionally, until the sauce thickens slightly.
Add the cooked gnocchi to the skillet, gently tossing them in the creamy tomato sauce. Let them cook together for an additional 2-3 minutes to heat through.
Stir in the grated Parmesan cheese until melted and fully combined. Adjust seasoning if necessary.
Serve hot, garnished with additional basil and cherry tomatoes if desired.