Instructions

1. Put artichokes, 2 tbsp. lemon juice, and 6 cups water in a 4-quart saucepan. Boil, reduce heat, and simmer until crisp-tender, about 5 minutes. Drain artichokes; transfer to a medium bowl; toss with 4 tbsp. oil and salt and pepper. Heat a 12" grill pan over high heat. Place artichokes cut side down on grill pan and cook until tender, 6 minutes per side. Return grilled artichokes to the bowl and cover with plastic wrap; set aside.
2. Bring a large pot of salted water to a boil and add pasta; cook, stirring occasionally, until al dente, 6-7 minutes. Drain pasta, reserving 1 cup pasta water; set aside. Heat remaining oil and 3 tbsp. butter in a 12" skillet over medium heat; add chile flakes and garlic and cook, stirring, until garlic is soft, 4-5 minutes. Add remaining lemon juice along with zest, cooked pasta, and ½ cup Parmesan and toss together, adding reserved pasta water as needed to create a smooth sauce. Stir in remaining butter and parsley and season with salt and pepper. To serve, divide pasta evenly between four bowls and top with artichokes; garnish with Parmesan and parsley.