Start by cooking the fettuccine pasta according to package instructions in a large pot of salted boiling water. Once cooked, reserve ½ cup of the pasta water, then drain and set aside.
While the pasta is cooking, heat the olive oil in a large skillet over medium-high heat. Season the chicken breasts with garlic powder, Italian seasoning, salt, and pepper.
Place the chicken breasts in the hot skillet and cook for about 6-7 minutes on each side or until the chicken is golden brown and cooked through. Remove the chicken from the skillet and let it rest on a cutting board.
In the same skillet, add the halved cherry tomatoes and sauté for 2-3 minutes until they soften. Then add the heavy cream and chicken broth, stirring to combine.
Bring the mixture to a gentle simmer, then add the grated Parmesan cheese, mixing until it’s melted and the sauce thickens (about 3-5 minutes). If the sauce is too thick, use the reserved pasta water to thin it to your desired consistency.
Slice the rested chicken into strips and return it to the skillet, along with the drained fettuccine pasta. Toss everything together until the pasta is well coated with the creamy sauce.
Serve immediately, garnished with fresh basil leaves and a sprinkle of red pepper flakes for an extra kick, if desired.