Brown the ground turkey in a large pot over medium-high heat, breaking it up as it cooks.
1 pound ground turkey
When the turkey is almost done, add the mushrooms and cook for another 1-2 minutes until the turkey is done and the mushrooms start to soften.
8 ounces sliced mushrooms
Mix in the marinara sauce and Italian seasoning, and then add 4 cups of water. Heat until it starts to simmer.
24 ounces marinara sauce, 2 teaspoons Italian seasoning
Add the rigatoni and continue to heat until it starts to simmer again.
12 ounces rigatoni (uncooked)
Reduce the heat to medium-low so that it is gently bubbling and cook uncovered for about 25-30 minutes, stirring periodically, until the pasta is tender and the liquid has thickened.
Taste and season with additional Italian seasoning and salt/pepper as needed. Serve with grated Parmesan cheese and chopped basil, if desired.
Notes
You can substitute ground beef for the ground turkey if desired, however you may need to drain the grease from the pot after browning the meat if it isn't extra lean.
You can substitute jarred mushrooms if you don't have fresh on hand.
You can use any type of pasta, but you may need to adjust cooking time accordingly.
The flavor of the marinara sauce has a big impact on this dish, so choose a good quality sauce or use additional seasonings if needed.