Start by bringing a large pot of salted water to a vigorous boil. Carefully add the cheese tortellini and cook according to the package instructions, usually around 3 to 5 minutes, or until they are tender yet firm to the bite (al dente). Once cooked, drain the tortellini and rinse them under cold water to halt the cooking process and cool them down.
In a spacious mixing bowl, combine the cooled tortellini with the halved cherry tomatoes, roughly chopped fresh spinach, grated Parmesan cheese, and finely chopped red onion. Gently stir to ensure even distribution of the ingredients.
In a separate small bowl, whisk together the creamy pesto, freshly squeezed lemon juice, and extra virgin olive oil until the mixture becomes smooth and well combined. This will create a delightful dressing for your salad.
Pour the pesto dressing over the tortellini mixture and gently toss everything together, ensuring that all components are well-coated in the creamy goodness of the pesto.
Taste your salad and season it with salt and freshly ground black pepper to your liking. If you desire a bolder pesto flavor, feel free to add a little more creamy pesto to suit your taste.
Cover the bowl with plastic wrap or a lid and place it in the refrigerator. Chill the salad for at least 30 minutes, allowing the flavors to meld beautifully.
Once chilled, you can serve the salad cold or at room temperature. For an added touch, garnish each serving with extra grated Parmesan cheese and a few fresh spinach leaves for color and presentation.