Heat a large sauté pan over medium-low heat and add the olive oil.
Add the minced garlic and Italian seasoning and sauté about 1 minute until fragrant, taking care not to brown the garlic.
Pour in the vegetable broth and scrape the pan to loosen any browned bits.
Add the gnocchi, chopped sun-dried tomatoes, crushed red pepper flakes, kosher salt, and black pepper; stir to combine.
Bring the mixture to a boil, then reduce to a simmer, cover, and cook about 5 minutes until the gnocchi is tender.
Remove the lid and stir in the chopped spinach; cook about 1 minute until wilted.
Stir in the grated Parmesan, heavy cream, and chiffonaded basil; simmer briefly until warmed and sauce is slightly thickened. Taste and adjust salt and pepper as needed.
Serve the gnocchi topped with additional shredded Parmesan and basil leaves, and more crushed red pepper if desired.