Cook pasta: Bring a large pot of water to the boil. Add macaroni and cook per packet directions MINUS 1 minute.
Toss in butter: Drain, return pasta to pot, add butter and toss until melted. Set aside to cool while making the Sauce.
Mix together Topping. Set aside.
Preheat oven to 180°C/350°F (all oven types).
Make roux: In a large saucepan or in an ovenproof skillet, melt butter over medium heat. Add flour and cook, stirring constantly, for 1 minute.
Add milk: Add about 1 cup of the milk and mix to dissolve the paste into the milk. Then add remaining milk and mix until lump free.
Add Seasonings: Mix in salt and Seasonings if using.
Thicken sauce: Cook, stirring/whisking regularly, for 5 - 8 minutes until thickened to a cream consistency.
Add cheese: Remove from stove, add cheese and stir - cheese doesn't need to melt.
Check salt: Adjust salt to taste.
Assemble: Pour Sauce into pot with Macaroni. Stir quickly, then pour back into the skillet or a baking dish. Sprinkle with breadcrumb topping.
Bake for 25 minutes or until top is light golden.
Serve: Serve immediately!
