In a large nonstick pan, brown turkey. Break into smaller chunks while cooking. Once browned, remove from heat and pour into a colander to drain the fat. This step will cut the fat from the turkey way down. Add back to pan.
Using a mini chop, food processor or blender, add onions, carrots, celery and garlic. Process until pureed. See shopping tip.
Add veggies to browned and drained turkey. Cook on medium heat for 2 minutes. Stir often.
Add cottage cheese to a mini chop, food processor or blender and puree. Mix into turkey and vegetables and cook for 1 minute.
Stir in tomato paste and cook for 1 more minute. Add tomatoes, wine, vinegar, Italian seasonings, salt, red pepper flakes and mix well. Bring to a boil, reduce heat to medium low and cook for 40 minutes. Stir frequently.
To cook spaghetti squash: Pierce squash in several places with a fork. Place in microwave and cook for about 10 to 12 minutes, until soft. Let stand for about 5 minutes to finish steaming. Cut in half and using a fork, scoop out seeds and strands.
Serve sauce over 1 cup spaghetti squash. Sprinkle with a little Parmesan cheese, if desired.
This sauce freezes great.