Preheat the grill to high. Halve the zucchinis length-wise and cut the peppers into large chunks and remove seeds.Separate the layers of the pitas to make 6 pita circles.
Drizzle olive oil over the zucchini, peppers, and pitas, and salt and pepper them.
Roll them around, to make sure they have a good coat of oil. Grill the veggies for about 2-3 minutes per side, until nice grill marks have formed and the veggies are slightly tender. Then grill the pitas, for 1 minute per side, until toasty.In a large serving bowl, add all the other veggies and herbs.Once the grilled veggies have cooled, chop them into inch cubes and add them to the serving bowl.Break the pitas into bite-size pieces and add to the mix. Toss the salad and sprinkle the feta over the top.
Mix cup of olive oil and the juice of one lemon in a small bowl. Season with cumin, salt and pepper and whisk.