• Bring a large pot of water to a boil. Add a large pinch of salt and pasta. Cook according to package instructions.

  • In a large straight-sided skillet, heat oil and 1 tablespoon butter over medium-high heat. Add shallots, and cook until softened, about 3 minutes. Add brussels sprouts and 2 tablespoons water. Season with salt. Cook until brussels sprouts are tender, about 2 minutes. Add mushrooms and oregano. Season with pepper. Cook until mushrooms have softened. Remove skillet from heat, and stir in remaining 1/2 tablespoon butter.

  • Drain pasta, and transfer to a platter. Top with mushroom and brussels sprouts mixture. Serve immediately.