Season chicken with salt, pepper, and paprika. Sear in olive oil until golden and cooked through. Remove and set aside.
Melt butter in the same skillet, sauté garlic for 30 seconds. Add chicken broth, scraping browned bits. Stir in heavy cream, onion powder, and Italian seasoning; simmer 3-4 minutes.
Stir in Parmesan cheese until melted. Add spinach and cook until wilted, 2-3 minutes. Return chicken to skillet and simmer 3-4 minutes to combine flavors.
Serve immediately with pasta, rice, or vegetables.
Notes
For a lighter version, use half-and-half instead of heavy cream.