Bring a large pot of salted water to boil and cook the pasta according to package instructions.
Make the dressing: Whisk together the olive oil, lemon juice, water, mustard, garlic, Italian seasoning, red pepper flakes, and salt in a small bowl. Set aside.
Drain the pasta, toss it with a drizzle of olive oil to keep from sticking together and let cool to room temperature.
Transfer pasta to a large bowl and add tomatoes, chickpeas, spinach, cucumbers, pepperoncini (optional), feta, parsley, ane oregano or mint. Pour the dressing over the top and toss to coat. Season with salt and pepper to taste and serve!