Heat oil in a large pot over medium heat. Add onion and peppers and cook for 2 - 3 minutes to soften.
Add carrots, garlic, ground turkey, and turkey sausage and cook while breaking into small pieces with a spatula. While turkey is browning, add salt, pepper, worcestershire, red pepper flakes, and fennel.
Add crushed tomatoes, stewed tomatoes, tomato sauce, tomato paste, and bay leaves. Bring to a boil then reduce heat to low and let simmer uncovered for 45 minutes to 1 hour, stirring occasionally. During the last 15 minutes of cooking time, add chopped fresh herbs. If sauce is too acidic, add sugar to taste (normally about 1/2 Tbsp.).
Garnish with additional chopped parsley and parmesan cheese if desired before serving over pasta.
*This is enough sauce to cover approximately two lbs. of uncooked spaghetti noodles. *Sauce can be frozen for up to 3 months.