Soften the Sun-Dried Tomatoes: Place the sun-dried tomatoes in a heat-safe bowl and pour hot water over them. Let them soak for about 10 minutes, then drain the water and chop them into small pieces.
Prepare the Chicken: Slice the chicken breasts in half lengthwise to create cutlets. Season both sides with salt and pepper.
Cook the Chicken: Heat half of the olive oil in a large skillet over medium heat. Add the chicken cutlets and cook for 4-6 minutes per side, or until golden and cooked through. Transfer the chicken to a plate and set aside.
Sauté the Aromatics: Add the remaining olive oil to the skillet. Sauté the finely chopped shallot and garlic until softened and fragrant.
Make the Sauce: Reduce the heat to low. Stir in the milk, cream cheese, tomato paste, chopped sun-dried tomatoes, Parmesan cheese, oregano, and optional red pepper flakes. Mix until the cream cheese has fully melted and the sauce is smooth.
Thicken the Sauce: In a small bowl, whisk together 2 teaspoons of cornstarch and 2 teaspoons of cold water. Pour the slurry into the skillet, stirring occasionally, until the sauce thickens.
Combine Chicken and Sauce: Return the chicken to the skillet, spooning the sauce over the top. Let it simmer for a few minutes until heated through and the chicken reaches an internal temperature of 165°F.
Serve and Garnish: Finish with fresh chopped basil, serve warm, and enjoy!