Add chicken bone broth, heavy cream, cottage cheese, sun-dried tomatoes, tomato paste, Italian seasoning, and crushed red pepper flakes. Simmer until thickened.
Return chicken to the skillet, spoon sauce over it, and simmer for an additional 2-3 minutes.
Plate the chicken, spoon rich sauce over each piece, and serve with grated Parmesan.
Notes
Rest the chicken for 5 minutes after cooking for maximum juiciness. Adjust crushed red pepper for spice level.