Cook the pasta: Bring a large pot of water to a boil. Cook the protein pasta according to the package directions. Drain and set aside.
Warm the chicken: Add avocado oil to a large skillet over medium heat. Add the roasted chicken breast and warm for 2 to 3 minutes.
Add the sauce: Pour in the spaghetti sauce. Stir in the garlic powder. Let the sauce simmer for 3 to 5 minutes.
Add the pasta: Add the cooked protein pasta to the skillet. Stir until the pasta is fully coated in sauce.
Add broccoli: Stir in the roasted broccoli. Mix gently so the broccoli stays in bite-sized pieces.
Melt the cheese: Sprinkle mozzarella over the pasta. Cover the skillet for 2 to 3 minutes, or until the cheese melts.
Serve warm: Scoop into bowls and serve hot. Add Parmesan, basil, or red pepper flakes if desired.