In a large serving bowl combine spinach, cheese, tomatoes, green onions, garlic, lemon peel and juice, oil, oregano, dill, thyme, salt, and pepper. Cover; let stand at room temperature while preparing pasta or up to 2 hours; stirring occasionally.: The aroma right away is herbaceous and citrusy, and you should sense a lively citrus perfume from the lemon peel and juice combined with the fresh herbs. Mixing these ingredients cold allows the flavors to mingle gently without wilting the spinach prematurely. Stirring occasionally helps the salt and lemon pull moisture from the spinach , which creates a subtle dressing that clings to leaves. One common mistake is overmixing at this stage which can bruise the greens and make them soggy, so handle gently.
Shortly before serving, cook pasta according to package directions. Drain pasta, reserving 1/4 cup of the cooking water. Toss cooked pasta and pasta water with spinach salad mixture. Serve warm or at room temperature. Top with shaved Parmesan cheese.: As the mixture rests, the olive oil and lemon will continue to infuse the spinach and softened sun dried tomatoes, improving depth of flavor. You may notice the texture shift as the leaves relax and become more supple, which helps them embrace the warm pasta later. Avoid leaving it out far longer than two hours for freshness and safety reasons, and be sure to stir occasionally so the seasoning is even.
Shortly before serving, cook pasta according to package directions: The kitchen will fill with a toasty, starchy perfume as the tortellini cooks, and you want it tender but still with slight bite. Cook times vary by brand, so taste a piece about a minute before the package time ends to ensure it is not overdone. Overcooking will produce broken pasta and a gluey texture, so be vigilant.
Drain pasta, reserving 1/4 cup of the cooking water: That reserved hot pasta water is liquid gold for marrying the dressing to the tortellini . It contains starch that helps emulsify the oil and lemon into a silky coating, creating a more cohesive salad. After draining, check the pasta temperature and use the reserved water sparingly to adjust the dressing. A mistake is discarding the water which can leave the salad dry.
Toss cooked pasta and pasta water with spinach salad mixture: When you fold the hot tortellini into the salad, you should hear a soft rustle as the leaves warm and the dressing loosens. The senses will catch a blend of warm pasta starch, citrus, and herb scent. Toss gently to keep the tortellini intact while ensuring even coating; over vigorous tossing can tear the delicate pasta or bruise the greens. If the salad feels dry, add small teaspoons of the reserved water until it glistens.
Serve warm or at room temperature: The final serving temperature affects texture and perception of flavor, with warm salad feeling more comforting and room temperature highlighting the herbs and lemon. As you serve, the shaved Parmesan will melt slightly on warm tortellini , becoming glossy and aromatic. Be mindful not to overheat, which could wilt the spinach excessively. A frequent misstep is waiting too long to serve, which diminishes the contrast between warm pasta and fresh herbs.
Top with shaved Parmesan cheese: The shaving process releases a nutty, savory aroma that crowns the salad. Add the shavings at the last minute so they retain their structure and provide textural lift against softer elements. If you add them too early, they will melt into the salad and lose visual appeal. Use a vegetable peeler to create thin shavings for the best presentation.