Preheat your oven to 350°F and spray an 9x12" baking dish with nonstick spray - set aside.
Cover the bottom of the baking dish with half the spaghetti sauce (12 ounces' worth). Set aside.
While the oven is warming up, cook pasta al dente according to the directions on the box (typically around 9 minutes). Once cooked, drain and set aside to cool.
In a large pan, cook ground turkey until browned, stirring frequently. Add garlic and stir for a minute or two until fragrant. Remove from heat.Note: If you don’t have garlic cloves, you can substitute: ½ teaspoon minced garlic,⅛ teaspoon garlic powder, or ½ teaspoon garlic salt. In a medium bowl, lightly beat one egg. Add the cooked ground turkey, ricotta cheese, half the mozzarella cheese, parmesan cheese, and parsley. Add a little salt and pepper if you’d like, and mix well.
Using a large spoon, stuff each shell with the ground turkey mixture. It can be kind of tricky, depending on how “curly” your noodles are, but I promise it’s worth it! I usually spoon mixture up under one of the curves and then fill the rest – it seems to be the easiest.
As you’re stuffing the shells, place each shell in the glass baking dish. Place them closely together so they don’t tip over.
Pour the remaining 12 ounces spaghetti sauce over the shells, then cover in the remaining half of mozzarella cheese.
Bake at 350°F for 20-25 minutes (or until the cheese is bubbling on the top).
Serve immediately with a side of garlic bread or cheesy biscuits and enjoy!