01 - Bring a large pot of salted water to a boil. Cook gnocchi according to package instructions. Reserve ¼ cup pasta water, then drain and set aside.
02 - Heat olive oil in a large skillet over medium heat. Add turkey sausage, breaking it up with a spoon, and cook until browned and fully cooked, about 5 to 6 minutes. Transfer sausage to a plate.
03 - In the same skillet, add chopped onion and sauté until softened, about 3 minutes. Add minced garlic and cook until fragrant, about 30 seconds.
04 - Add chopped kale to the skillet and cook, stirring frequently, until wilted, approximately 2 to 3 minutes.
05 - Return cooked sausage to the skillet. Pour in chicken broth, scraping up any browned bits on the pan surface. Stir in heavy cream and grated parmesan cheese. Simmer gently for 2 to 3 minutes until the sauce slightly thickens.
06 - Add the cooked gnocchi to the skillet and toss gently to coat in the cream sauce. Add reserved pasta water a little at a time as needed to adjust sauce consistency.
07 - Season with black pepper, crushed red pepper flakes (if using), and salt to taste. Serve immediately, garnished with extra grated parmesan and freshly ground black pepper.