Heat a large sauté pan over medium-low heat and add 1 tablespoon olive oil.
Add the minced garlic and 2 teaspoons Italian seasoning and sauté for about 1 minute, until fragrant but not browned.
Pour in 1 1/2 cups vegetable broth, scraping the pan to loosen any browned bits.
Add the gnocchi, chopped sun-dried tomatoes, 1/8 teaspoon crushed red pepper flakes, 1/8 teaspoon kosher salt, and 1/4 teaspoon black pepper; stir to combine.
Bring the mixture to a boil, then reduce heat to a simmer and cover. Cook for 5 minutes, or until the gnocchi are tender.
Remove the lid and stir in the chopped spinach; cook about 1 minute until wilted.
Stir in 1/2 cup grated Parmesan, 2/3 cup heavy whipping cream, and the chiffonaded basil leaves; cook briefly until heated through and sauce is slightly thickened.
Taste and adjust seasoning with additional salt and pepper if desired, then serve topped with extra Parmesan and basil.