Preheat the oven to 375℉. Spray a 3-quart casserole dish with nonstick spray.
In a large pan, heat the oil over medium-heat and add onion, garlic and red pepper flakes. Saute until onions have softened, about 4 minutes. Crumble in the ground turkey and cook until the turkey is browned, about 5 minutes. Stir in the pasta, marinara sauce, parsley and 1 cup of the cheese. Spoon the pasta mixture into the prepared dish. Sprinkle remaining ½cup of cheese on top and the Parmesan cheese too.
Bake until cheese is melted and bubbly, about 20 minutes.
Notes
I'm not always such a fan of whole wheat pasta, but I really like the Delallo Foods brand- we used their whole wheat shells for this recipe. Delallo is in select stores, but you can always find it at Whole Foods Market.
4 cups of cooked pasta equates to about 2 cups dried.
Use a good cheese for this recipe- I used a very flavorful Monterey Jack. Sometimes Jack can be quite mild. You can also use Swiss, Provolone or Mozzarella (or a blend!)