Step 1: Prepare the Chicken: Pat the chicken breasts dry and season with salt, pepper, garlic powder, and Italian seasoning. Heat olive oil in a large skillet over medium-high heat. Sear the chicken for 5–6 minutes per side until golden brown and cooked through. Remove from the pan and let rest for 5 minutes, then slice into strips.
Step 2: Cook the Pasta: Boil fettuccine in salted water according to package instructions until al dente. Drain and set aside, reserving ½ cup pasta water.
Step 3: Make the Alfredo Sauce: In the same skillet, melt butter over medium heat. Add minced garlic and sauté for 1 minute until fragrant. Pour in heavy cream and bring to a gentle simmer. Stir in Parmesan cheese until melted and smooth. Add nutmeg if desired. Adjust thickness with reserved pasta water as needed.
Step 4: Combine Pasta and Chicken: Add the cooked fettuccine to the Alfredo sauce and toss to coat evenly. Top with sliced chicken and garnish with parsley.
Step 5: Prepare Garlic Breadsticks: Preheat oven according to dough instructions (usually 375°F/190°C). Roll out dough and cut into sticks. Mix melted butter with minced garlic, parsley, and salt. Brush over breadsticks. Bake 10–12 minutes or until golden brown.