1. Bring large pot of water to boil. Add garlic salt to water, and cook pasta according to directions.
2. Heat 1/2 tablespoon olive oil in large nonstick pan; sauté shallot. Add all mushrooms, and cook over medium-high heat for 5–6 minutes or until brown; turn to brown on opposite side for another 5–6 minutes. Season with 1/2 teaspoon salt and 1/4 teaspoon pepper.
3. Drain pasta. Toss in a large bowl with mushroom mixture. Add the truffle oil, remaining 1 tablespoon olive oil, and remaining salt and pepper. Toss to combine.
4. Top with Parmesan and parsley; serve hot.
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