Start by cooking the pasta according to the package instructions until al dente. Once cooked, drain and rinse the pasta under cold water.

While the pasta cooks, prepare the dressing by whisking together olive oil, Dijon mustard, fresh lemon juice, salt, and pepper in a medium bowl until well combined.

Once the pasta is cooled, combine it in a large bowl with cherry tomatoes, cucumber, red onion, and parsley. Pour the dressing over the salad and toss gently to coat.

Adjust the seasoning with more salt and pepper as needed, and add optional feta cheese or chickpeas if desired.