Step 1.

• Boil a large pot of water.

Step 2.

• In a large sauté pan, heat 2 Tablespoons of olive oil over medium high heat. Add button mushrooms and sauté until golden brown. Remove from pan.

Step 3.

• In the same pan, add sliced onions and caramelize over medium heat. Add garlic and cook until aromatic, about one minute.

Step 4.

• Add white wine and deglaze pan, scraping bottom with a wooden spoon. Add mustard and red pepper flakes and reduce by half under medium heat. 

Step 5.

• Add butter and emulsify with sauce. Finish with lemon juice, sage, and thyme. Return mushrooms to sauce.
• Cook pasta according to box instructions. Combine with sauce. 

Step 6.

• Plate. Garnish with sage and shaved parmesan.