In a salad bowl toss together tomatoes, chick peas and cucumbers. Add avocado and parsley and gently toss. Add desire amount of dressing and the feta and gently toss to evenly coat. Serve within an hour for best results.
For the dressing:
In a blender (or mixing bowl with a whisk), blend olive oil, lemon juice, mustard, garlic and salt until mixture is well emulsified. Stir in basil and oregano.