Preheat oven to 375 degrees.
Cook pasta al dente, according to package directions.
Place oil in a saute pan over medium heat and cook onions for 4 minutes. Add garlic and cook for an additional minute.
Add ground turkey, salt and Italian herbs. Cook for an additional 6-8 minutes or until turkey is cooked through.
Place cooled ground turkey mixture in a bowl with ricotta, parmesan and eggs. Stir to combine.
Place 2 tbsp of turkey mixture in each pasta shell.
Cover the bottom of a 9 x 11 inch baking dish with 1/2 cup of the red sauce.
Place the shells, seam side down, into the dish.
Cover with remaining tomato sauce, mozzarella cheese and remaining parmesan cheese.
Cover with foil and bake for 30 minutes. Remove foil and continue to bake for an additional 10 minutes.
Serve.