In a large pot of boiling salted water, cook the tortellini according to package instructions until al dente. Drain and set aside.
In a large skillet over medium heat, heat the olive oil. Add the minced garlic and sauté for 1-2 minutes, until fragrant, but not browned.
Lower the heat and pour in the heavy cream, stirring to combine. Add the basil pesto and mix until smooth.
Stir in the grated Parmesan cheese and allow the sauce to simmer for about 3-5 minutes, until it thickens slightly. Season with salt and pepper to taste.
Add the cooked tortellini to the skillet, gently tossing to coat them in the creamy pesto sauce.
Stir in the halved cherry tomatoes, cooking for an additional 2-3 minutes to warm them through.
Remove from heat and garnish with fresh basil leaves.
Notes
Fresh basil leaves can be used for garnish to enhance flavor.