To make Everything Bagel seasoning, in a medium bowl, stir to combine toasted sesame seeds, poppy seeds, onion flakes, garlic flakes and salt.
In a large skillet over medium heat, melt butter. Stir in the garlic and cook until fragrant, about 1 minute, then stir in the heavy cream. Bring to a simmer and stir in the chicken and 2 teaspoons everything bagel seasoning. Simmer for about 6-8 minutes until chicken is just cooked through, then stir in 1/2 cup grated parmesan cheese.
Continue to cook at a simmer for 3-4 minutes, then stir in the cream cheese, fettuccini and broccoli. Stir to coat and top pasta with 1 tablespoon Everything Bagel Seasoning, 1/4 cup grated parmesan cheese, salt and pepper.