01 - Preheat oven to 400°F.
02 - Pat chicken breasts dry with paper towels. Season both sides generously with kosher salt and black pepper.
03 - Heat olive oil in a large oven-safe skillet over medium-high heat. Add chicken breasts and sear for 3-4 minutes per side until golden brown. Remove chicken from skillet and set aside on a plate.
04 - In the same skillet, add chopped onion and cook for 2 minutes until translucent. Add minced garlic and cook for 30 seconds until fragrant.
05 - Add chopped spinach to the skillet and cook until wilted, approximately 2 minutes. Stir in chopped artichoke hearts and cook for 1 minute more.
06 - Combine cottage cheese, chicken broth, Parmesan cheese, half of the mozzarella cheese, Italian herbs, and red pepper flakes in a blender or food processor. Blend until completely smooth.
07 - Pour the blended sauce into the skillet with the spinach and artichoke mixture. Stir well to combine and bring to a gentle simmer.
08 - Nestle the seared chicken breasts into the sauce. Spoon some of the sauce mixture over each piece of chicken. Sprinkle with the remaining mozzarella cheese.
09 - Transfer the skillet to the preheated oven and bake for 15-18 minutes, until chicken reaches an internal temperature of 165°F and the sauce is bubbling.
10 - Let the dish rest for 5 minutes before serving. Spoon sauce over chicken and garnish with extra Parmesan or fresh herbs if desired.