Cook the noodles according to package directions; rinse and drain. In a nonstick skillet, cook turkey and onion over medium heat until turkey is no longer pink.
Meanwhile, in a small saucepan, bring broccoli and water to a boil. Reduce heat; cover and simmer for 5 minutes or until crisp-tender; drain.
Add the broccoli, ricotta, egg, milk, thyme and salt to the turkey mixture.
Spread over each noodle; drizzle each with 1/4 cup spaghetti sauce. Carefully roll up jelly-roll style.
Place seam side down in an 8-in. square baking dish coated with cooking spray.
Drizzle with remaining spaghetti sauce.
Cover and bake at 375° for 45-50 minutes or until a meat thermometer reads 160°.