Boil salted water in a large pot, then cook spaghetti according to package instructions for 8-10 minutes. Drain and rinse under cold water.

In a mixing bowl, whisk together lemon juice, olive oil, honey, Italian seasoning, salt, and pepper until smooth.

Prepare vegetables: chop cherry tomatoes, dice cucumbers, and slice red onion. Add to dressing and stir gently.

Let the vegetable mixture marinate for 5-10 minutes to blend flavors while fluffing the cooled spaghetti.

Combine spaghetti with marinated vegetables, crumble feta over the top, and toss gently to mix well.

Taste and adjust seasoning as needed, chill briefly, and serve.