01 - Bring a large pot of salted water to a rolling boil. Add pasta and cook according to package directions until al dente. Drain thoroughly in a colander and rinse under cold running water to stop cooking and cool completely.
02 - In a large mixing bowl, whisk together olive oil, lemon juice, Dijon mustard, minced garlic, chopped parsley, dill if using, salt, and black pepper until emulsified.
03 - Add cooled pasta to the bowl with the dressing. Toss gently to coat. Add halved cherry tomatoes, diced cucumber, diced red bell pepper, and sliced spring onions. Fold everything together until evenly distributed.
04 - Gently fold cottage cheese into the salad, being careful not to break up the curds too much. Ensure cheese is evenly distributed throughout.
05 - Taste and adjust seasoning with additional lemon juice, salt, or pepper as needed. Cover and refrigerate for at least 15 minutes to allow flavors to meld before serving.