1Preheat oven to 350 degrees F.Lightly grease a 9x13 inch baking dish.Sprinkle with 1 cup crumbled blue cheese over the baking dish.
2Fill a large pot with lightly salted water to a rolling
boil over high heat.Once the water is boiling,stir in the shell pasta,and return to a boil.Cook the pasta uncovered,stirring occasionally,until the pasta has cooked through,but is still firm to the bite,about 13 minutes.Drain well in a colander set in the sink.
3Heat a large skillet over medium-high heat.Cook and stir ground beef and onion until browned.Drain off excess grease.Stir in wing sauce,oregano,crushed red pepper flakes,garlic powder,seasoned pepper,onion powder,cooked pasta and white american cheese.Pour into the prepared baking dish,spoon with blue cheese dressing over beef/pasta mixture and cover with aluminum foil.
4Bake in the preheated oven for 20 minutes.Remove the casserole from the oven and sprinkle with remaining crumbled blue cheese and shredded parmesan cheese.Return to the oven and bake until the cheeses melts,about 5 minutes.