Boil water in pot or large skillet and cook pasta according to package directions. Drain and set aside.
Add pasta sauce, pressed garlic, pepper flakes and cottage cheese to skillet and heat until bubbly and hot. Add the chicken and cook until the chicken is heated through. Stir in the pasta and mozzarella cheese. Taste for seasoning, add salt and/or pepper as needed.
To start with raw chicken: Cook pasta as directed in step 1. Then add 1 tablespoon olive oil to the pan. Cut chicken into bite sized pieces and season with salt and pepper. Cook until brown on all sides and almost cooked through, 8-10 minutes (depending on size of pieces). Add the sauce to the pan with the garlic and cook until chicken is fully cooked through. Stir in cottage cheese, pasta, and mozzarella.