01 - Heat olive oil in a large skillet or Dutch oven over medium heat. Add the onion, carrots, celery, and bell pepper. Sauté for 5-6 minutes, until softened.
02 - Add the garlic and cook for 1 minute, stirring frequently until fragrant.
03 - Add the ground turkey. Cook, breaking up with a spoon, until browned and cooked through, 6-8 minutes.
04 - Stir in the crushed tomatoes, chicken broth, oregano, basil, thyme, red pepper flakes, salt, and pepper. Bring to a gentle simmer.
05 - Reduce heat to low. Cover and simmer for 20-25 minutes, stirring occasionally, until the sauce thickens and flavors meld.
06 - While the sauce simmers, heat a large nonstick skillet over medium-high heat. Add zucchini noodles and sauté for 2-3 minutes, just until slightly tender but still crisp. Do not overcook.
07 - Serve the turkey Bolognese sauce over the zucchini noodles. Garnish with parsley and Parmesan cheese, if desired.