Preheat oven to 350°F.
Prepare an 8x8-inch baking dish by spraying it was nonstick cooking spray. Next, spread 1cup of spaghetti sauce in the bottom Set aside.
Prepare shells by cooking them according to the package directions. Set aside and allow tocool.
In a large mixing bowl, combine ricotta cheese, 1 cup shredded mozzarella cheese, 1 cupgrated parmesan cheese, 1 teaspoon garlic powder, and ½ teaspoon garlic salt.
Stuffcooled shells with cheese mixture and place them in the prepared baking dish.
Cover baking dish with aluminum foil and bake for 32 minute.
To prepare Alfredo sauce, place 7 tablespoon butter in a large skillet over medium heat. Cook untilbutter is melted.
Slowly pour in ⅔ cup heavy whipping cream, stirring continuously.
Add 1 teaspoon garlic powder and ½ teaspoon garlic salt. Stir again.
Add ½ cup shredded mozzarella cheese and ½ cup grated parmesan Stir until smooth.Remove from heat.
When shells are cooked, drizzle Alfredo sauce over top of shells.
Spoon remaining ½ cup spaghetti sauce over top also.
In a small bowl, melt 1 tablespoon butter and stir in breadcrumbs. Sprinkle breadcrumbs over top.
Broil uncovered for 2-3 minutes or until top begins to brown.