Step 1: Cook the Tortellini
Bring a large pot of salted water to a boil. Add the tortellini and cook according to package instructions until al dente (usually 4-5 minutes for fresh tortellini and 8-10 minutes for frozen). Drain the tortellini and toss with 1 tablespoon of olive oil to prevent sticking. Set aside.

Step 2: Make the Pesto Sauce
In a food processor or blender, combine the fresh basil, Parmesan cheese, pine nuts, garlic, and a pinch of salt and pepper. Pulse until the ingredients are finely chopped. With the motor running, slowly drizzle in the olive oil until the mixture forms a smooth, creamy pesto. Taste and adjust seasoning with more salt, pepper, or a squeeze of lemon juice if desired.

Step 3: Combine Tortellini and Pesto
In a large mixing bowl, combine the cooked tortellini with the pesto sauce. Toss gently to ensure every piece is coated in the vibrant, green sauce.

Step 4: Add Optional Ingredients (if desired)
For extra flavor and texture, fold in your choice of add-ins, such as cherry tomatoes, steamed broccoli, or cooked chicken.

Step 5: Serve and Garnish
Transfer the pesto tortellini to a serving platter or individual plates. Garnish with fresh basil leaves, shaved Parmesan, and toasted pine nuts for a beautiful presentation. Serve immediately and enjoy!