Pat chicken dry with paper towels and season with salt, black pepper, and Italian seasoning.
Heat olive oil in a large skillet over medium-high heat.
Cook chicken for 5–6 minutes per side until golden brown and fully cooked. Remove and set aside.
In the same skillet, add sliced zucchini and cook for 4–5 minutes until slightly tender.
Stir in garlic and sun-dried tomatoes and cook for 1 minute until fragrant.
Pour heavy cream into the skillet and stir gently.
Add parmesan cheese and Italian seasoning. Simmer until sauce becomes smooth and slightly thickened.
Return chicken to the skillet and spoon sauce over the top.
Simmer for 2–3 minutes until warmed through.
Garnish with basil or extra parmesan cheese if desired.
Serve warm on its own or over pasta, rice, or mashed potatoes.