Ingredients

1/4 cup, plus 2 1/2 teaspoons kosher salt
1 pound dried linguine or linguine rigate
1/4 cup olive oil
2 tablespoons unsalted butter
8 cups thinly sliced onions
2 tablespoons thinly sliced garlic
1 cup kalamata olives, roughly chopped
1 teaspoon chopped fresh rosemary leaves
1 teaspoon freshly ground black pepper
2 tablespoons chopped fresh parsley leaves
1 cup coarsely grated Pecorino Romano

Directions

Set a large, 1-gallon stock pot with a
pasta insert 3/4 full with water over high heat and bring to a boil. Add 1/4 cup of the salt to the water as
it boils. Place the linguine in the salted water and return to a boil, stirring occasionally. Cook the pasta
until nearly al dente, 10 to 12 minutes. Drain and set aside, reserving 1 cup of the pasta cooking water.

While the pasta cooks, set a 14-inch saute pan over medium-high heat and add the olive oil and butter to the
pan and once the butter melts, add the onions to the saute pan. Cook the onions, stirring occasionally until
they have softened and become caramelized, about 10 to 12 minutes. Add the garlic, olives and rosemary to the
pan, stirring until fragrant, about 1 minute. Add the reserved pasta and reserved pasta cooking water to the
pan and season with the remaining 2 1/2 teaspoons kosher salt, pepper, and parsley. Cook, tossing to combine,
until the water has nearly evaporated, about 3 to 4 minutes. Remove from the heat, sprinkle with the grated
cheese and toss to combine. Serve while hot.