Add the macaroni to a large pan of boiling water with the olive oil and cook for 7-10 minutes until the pasta is just tender. Drain and rinse the macaroni under cold water. Return the pasta to the pan and set aside.

Melt the butter in a pan. Add the mushrooms and saute them until softened and golden, then season them with pepper. Preheat your oven to the Broil setting.

Add the heavy cream to the macaroni and crumble about 2/3 of the bleu cheese into the pan. Heat slowly for a few minutes, stirring, until the cheese is melted. Season with pepper.

Transfer the macaroni and cheese to an oven safe container and top with mushrooms and the last of the bleu cheese. Place it under the broiler for 2-3 minutes until lightly browned.