01 - Bring a large pot of salted water to a boil. Cook the tortellini according to package instructions until al dente. Drain and set aside, reserving ½ cup of the pasta cooking water.
02 - In a large skillet over medium heat, melt the butter. Add the minced garlic and sauté for about 1 minute until fragrant, but not browned.
03 - Pour in the heavy cream and bring to a gentle simmer. Cook for 2-3 minutes, stirring occasionally.
04 - Stir in the grated Parmesan cheese until melted and smooth. Lower the heat to low.
05 - Add the basil pesto, black pepper, and a pinch of salt. Mix until well combined.
06 - Add the cooked tortellini to the skillet. Toss gently to coat in the sauce, adding a splash of reserved pasta water if needed to reach your desired consistency. Serve immediately, garnished with fresh basil, extra Parmesan, and toasted pine nuts if desired.