Sear chicken: Season with salt, pepper, onion powder, garlic powder, and paprika. Sear in oil over medium-high heat 2-3 minutes per side until golden. Remove and set aside.
Cook aromatics: In the same pot melt butter. Cook onion, carrot, and celery until softened, 5-7 minutes. Add garlic and cook 1 minute.
Tomato paste: Add tomato paste and cook stirring for 2-3 minutes until darkened. Add sun-dried tomatoes.
Flour: Stir in flour until no dry bits remain, about 1 minute.
Add liquids: Pour in heavy cream and chicken broth. Add Italian seasoning, thyme, and oregano. Bring to a simmer.
Add chicken: Slice or shred chicken and return to pot. Simmer 10 minutes until cooked through.
Gnocchi and spinach: Add gnocchi and cook until floating, 3-4 minutes. Stir in spinach until wilted.
Serve: Top with fresh basil and parmesan. Serve immediately.