Begin by patting the chicken breasts dry with paper towels. Season both sides with salt, pepper, and garlic powder.
In a large skillet, heat the olive oil over medium-high heat. Add the chicken breasts and sear for about 5-7 minutes on each side until golden brown. Remove from skillet.
In the same skillet, reduce heat to medium and add minced garlic. Sauté for about 30 seconds until fragrant. Add chicken broth, lemon juice, and Italian seasoning; stir to combine.
Pour in the heavy cream and bring to a gentle simmer. Stir in grated Parmesan cheese until melted.
Mix cornstarch with water until smooth. Slowly add to the sauce while stirring. Simmer until thickened.
Return chicken to skillet and coat in the sauce. Simmer for an additional minute to reheat. Serve immediately.
