Boil your pasta until it is al dente and pour in greased 13x9 baking dish. Add the chopped sausage on top of cooked pasta.
In a large pot, melt 1 tbsp. butter and sauté chopped onion, green pepper, and red pepper for about 5 minutes.
Add 6 tbsp. butter to sautéed vegetables and stir until melted.
Whisk in flour slowly and stir to make a thick roux. Let cook for a few minutes.
Slowly whisk milk into roux until all is combined and smooth.
Add all 6 cups of cheddar cheeses, salt, pepper, and ¾ tbsp. Creole seasoning to sauce pot. Cook and stir until the mixture is smooth and creamy and no lumps of cheese is stuck to the whisk.
Pour cheese mixture on top of sausage and noodles. Mix all together so cheese gets in all the corners and crevices.
Melt remaining tablespoon of butter and add breadcrumbs and ¼ tbsp. Creole Seasoning. Stir and sprinkle on top of pasta.