Heat a pot of boiling water and cook ½ lb of pasta al dente, according to the package instructions. Drain and set aside.
Heat a skillet over medium high heat. Add 2 tablespoon olive oil then sautee 4 minced garlic cloves with 8 oz sliced mushrooms until mushrooms soften. Add the mushrooms to a plate and set aside for now.
Add 3 teaspoon cornstarch, 2 teaspoon dijon mustard, 2 teaspoon dried thyme, ½ teaspoon salt and ½ teaspoon black pepper to the pan. Stir together.
Slowly stir in 2 ¼ cups heavy cream. Let the liquid simmer until the sauce thickens, about 2-3 minutes.
Now add back the cooked mushrooms and heat through for 1 minute.
Add the pasta noodles and parmesan cheese to the pot and mix together evenly with the sauce. Scoop onto plates and serve.