Prep the ingredients per the instructions above.
Preheat the oven to 350 °F (176 °C).
Fill a pot halfway with water and set over high heat until boiling. Add salt to season the water. Cook the broccoli until tender then drain well and set aside.
Season the chicken well with salt and pepper. Then drizzle with oil.
Heat a saute pan over medium heat. Saute the chicken until nicely golden brown. Then remove from the pan and set aside.
Make the alfredo sauce: In a sauce pan, melt the butter over medium heat. Add minced garlic and cook for 1 to 2 minutes. Stir in heavy cream and let reduce until creamy, about 5 to 8 minutes. While reducing, add the chicken back into the skillet and cook to an internal temperature of 160 °F (71 °C) using a thermometer.
Make the pasta: Fill a pot with water and set over high heat until boiling. Add salt to season the water. Cook the pasta per the instructions on the package.
Finish the alfredo sauce: Add half of the parmesan cheese to the mixture and whisk well until smooth.
Drain the pasta, reserving a small amount of pasta water (about 1/2 cup).
Finish the alfredo: add the pasta, chicken, and broccoli to the alfredo sauce and toss to coat. Garnish with the remaining parmesan cheese. Add the reserved pasta water as needed to bring the sauce to a smooth creamy consistency. Toss with parsley.
Mix together the sparkling water and cranberry juice. Serve over ice if desired.
Toast the baguette, then spread with butter.
Serve: Enjoy the fettuccine alfredo with bread and spritzer.