Heat a large sauté pan over medium heat and add the olive oil. Add the onion, garlic and bell pepper and sauté for 5 minutes.
Add the ground turkey, and use a spoon to break into small pieces. Cook until browned, about 5-7 minutes.
Add the can of tomato paste, chopped tomatoes, water, salt and pepper. Stir and bring to a boil, reduce to a simmer, cover and cook for 20-30 minutes until sauce is thickened.
Toss with cooked spaghetti noodles or pasts of choice. Sprinkle with parmesan cheese and red pepper flakes if desired.
Notes
To Store: Store leftover sauce in an airtight container in the fridge for 3-4 days once it has cooled completely. Reheat leftovers gradually on the stovetop or in the microwave.To Freeze: Cool sauce completely, then portion into freezer bags or containers, removing excess air before sealing. Add a label and date. Freeze for up to 4 months. To reheat, thaw in the refrigerator overnight and reheat.To Thaw: Transfer frozen sauce to the refrigerator overnight for gradual thawing. Alternatively, place sealed container or bag in cold water, changing water every 30 minutes until thawed.To Reheat: Reheat thawed sauce on the stovetop over medium heat, stirring occasionally, or in the microwave, stirring halfway through until warmed through.