Created by JostLori on May 6, 2017
Step 1: Start a large pot of water to boiling (for pasta).
Step 2: In a very large skillet, heat 2 tablespoons of the olive oil. Add the mushrooms. Season with salt and pepper, cover and cook over moderately high heat for 5 minutes, stirring once.
Step 3: Uncover and cook over HIGH heat, stirring once, until the mushrooms are browned all over, about 3 minutes.
Step 4: Add the sliced garlic, the shallot and rosemary and cook, stirring, until fragrant, about 2 minutes.
Step 5: Add the Marsala and cook until evaporated, about 30 seconds. Add the vinegar and cook, stirring, for 30 seconds.
Step 6: Stir in the minced garlic, olives and the remaining 3 tablespoons of olive oil. Taste and adjust seasoning if necessary. Cover and keep warm.
Step 7: Add salt to the boiling water, then cook the spaghetti until al dente; drain. Return the spaghetti to the pot. Stir in the butter and mushrooms and adjust seasoning if need be.
Step 8: Transfer the spaghetti to bowls, sprinkle with the chives and serve, passing more Parmesan at the table.