Prepare charcoal grill with coals in lowest position.
Roll out dough in shape desired.
Mix all ingredients for Tzatziki sauce. Spread thin layer over pizza dough (about 1/2 cup).
Thin slice tomatoes and set aside. Chop all other vegetables, drizzle with olive oil and place in grill pan on grill. Lightly grill until warmed, but not soft. Remove from grill and spread chopped vegetables over Tzatziki covered dough.
Place sliced tomatoes on top of vegetables and sprinkle with feta cheese and olives. Place on grill. Close lid on grill for 15 minutes or until dough is cooked through.