Watermelon Mint Drink: Mix watermelon chunks, water, and fresh mint together. Refrigerate until ready to serve. Serve over ice if desired.
Prep the ingredients per the instructions above.
Bring a pot of water to a boil. Add salt to season the water. Cook broccoli until tender, then drain well and set aside.
Season chicken with salt and pepper, then drizzle with olive oil.
Heat a grill or grill pan over medium heat. Grill the chicken on both sides to an internal temperature of 165°F (74°C). Set aside.
Alfredo: In a saucepan, melt butter over medium heat. Add garlic and cook for 1–2 minutes. Stir in heavy cream and let reduce until creamy, about 5–8 minutes. Add half of the Parmesan cheese to the cream mixture and whisk until smooth.
Fill another pot with water and set over high heat until boiling. Add salt to season the water. Cook pasta according to package instructions.
Drain pasta, reserving about 1/2 cup of pasta water.
Add pasta, chicken, and broccoli to the Alfredo sauce. Toss to coat. Garnish with the remaining Parmesan cheese. Add reserved pasta water as needed for a smooth, creamy consistency. Toss with parsley.
Tomato and Avocado Side: Portion tomato and avocado slices. Drizzle with olive oil, sprinkle with diced garlic, and season with salt.
Serve the fettuccine with tomato and avocado, and watermelon mint drink.