Season the chicken breasts with garlic powder, Italian seasoning, salt, and pepper on both sides.
Heat olive oil in a large skillet over medium heat. Add the seasoned chicken breasts and cook for about 6-7 minutes on each side until golden brown and cooked through. Remove the chicken from the skillet and set aside.
In the same skillet, add the halved cherry tomatoes. Cook for about 2-3 minutes until they start to soften.
Pour in the heavy cream and chicken broth, stirring to combine. Bring the mixture to a simmer, then reduce the heat to low.
Add the tortellini to the skillet and cook according to package instructions until they are al dente, about 3-5 minutes.
Stir in the fresh spinach and grated Parmesan cheese, allowing the spinach to wilt and cheese to melt into the sauce.
Slice the cooked chicken and return it to the skillet, stirring gently to combine everything. Simmer for an additional minute to heat through.
Serve warm, garnished with fresh basil leaves for a burst of flavor and color.