Spiralize zucchini into noodles using a spiralizer or julienne peeler.
Pat zucchini noodles lightly with paper towels to remove excess moisture.
In a large bowl, combine zucchini noodles, cherry tomatoes, cucumber, red onion, and fresh herbs.
In a small bowl, whisk together olive oil, lemon juice, Dijon mustard, garlic, salt, and pepper.
Pour dressing over salad and toss gently until evenly coated.
Top with feta cheese and any optional add-ins if desired.
Serve immediately or chill briefly before serving.