Heat olive oil and butter in a large skillet over medium heat.
Add cubed potatoes and cook for 8–10 minutes, stirring occasionally until they become lightly golden and tender.
Push the potatoes to one side of the skillet and add diced chicken and minced garlic.
Season with salt, pepper, and Italian seasoning, then cook the chicken for 6–8 minutes until fully cooked.
Mix the chicken and potatoes together, then pour in the heavy cream and add parmesan cheese.
Simmer for 3–5 minutes until the sauce thickens and coats the ingredients.
Optional: stir in spinach or peas and cook until slightly wilted.
Remove from heat, let rest for 5 minutes, and serve warm.