11. Pat chicken breasts dry with paper towels. Season aggressively with salt and pepper.
22. Heat olive oil in heavy cast-iron skillet until shimmering. Sear chicken breasts until golden brown and internal temperature reaches 165°F, about 6-7 minutes per side.
33. Remove chicken and rest on cutting board. Slice against grain into elegant diagonal strips.
44. In same skillet, melt butter until foaming. Add minced garlic and sauté until fragrant, about 45 seconds.
55. Pour heavy cream, whisking continuously. Reduce heat and simmer until sauce thickens slightly, approximately 4-5 minutes.
66. Fold in Parmigiano-Reggiano cheese, stirring until smooth and glossy.
77. Cook fettuccine in heavily salted boiling water until al dente, about 3 minutes. Reserve 1/4 cup pasta water.
88. Toss pasta directly into Alfredo sauce, adding reserved pasta water to achieve silky consistency.
99. Plate by twirling pasta using large fork, arranging sliced chicken on top. Garnish with fresh parsley.