In a large pot, bring salted water to a boil. Cook the tortellini according to the package instructions until al dente. Drain and set aside.
In the same pot, heat the olive oil over medium heat. Add the minced garlic and sauté for about 1 minute until fragrant but not browned.
Pour in the heavy cream and bring to a gentle simmer. Reduce the heat to low and stir in the pesto and grated Parmesan cheese until the mixture is smooth and creamy.
Season the sauce with salt and pepper to taste. Add the cooked tortellini to the sauce, along with the halved cherry tomatoes. Gently toss to coat the tortellini evenly in the creamy pesto mixture.
Cook for an additional 2-3 minutes to warm everything through.
Serve immediately, garnished with fresh basil leaves and extra Parmesan if desired.
Notes
Garnish with fresh basil and extra Parmesan for added flavor.