Prep the chicken: Pat chicken dry. Season both sides with 1/2 teaspoon salt, pepper, and Italian seasoning.
Sear the chicken: Heat olive oil in a large skillet over medium-high. Add chicken and cook 4–5 minutes per side, until golden and cooked through (165°F).
Transfer to a plate and tent loosely with foil.
Sauté the garlic: Reduce heat to medium. Add butter. When melted, add garlic and cook 30–60 seconds until fragrant.
Don’t brown it.
Blend the sauce base: In a blender, add cottage cheese, chicken broth, remaining 1/2 teaspoon salt, Parmesan, and red pepper flakes if using. Blend until completely smooth and silky, about 30–60 seconds.
Thicken (optional): If you prefer a thicker sauce, whisk cornstarch into the blended mixture before heating.
Simmer the sauce: Pour the blended sauce into the skillet with the garlic. Bring to a gentle simmer over medium heat, stirring often, 2–3 minutes until it slightly thickens.
Taste and adjust salt or pepper.
Return chicken to the pan: Add chicken and any juices back to the skillet. Spoon sauce over the top and simmer 2 minutes to warm through.
Finish and serve: Stir in parsley. Serve over cooked pasta or vegetables.
Sprinkle with extra Parmesan.