Marinated Greek lamb skewers

Name: Marinated Greek lamb skewers
Ingredients: 2 tablespoon extra virgin olive oil; 2 teaspoon grated lemon rind; 1 teaspoon dried oregano leaves; 1 clove garlic, crushed; 800 gram lamb backstraps, cut into 3cm pieces (or diced lamb); 8 pita bread; lemon wedges, for serving; 2 large (440g) tomatoes, chopped coarsely; 1 (130g) lebanese cucumber, halved lengthways, sliced diagonally; 1/2 small (50g) red onion, sliced thinly; 1/2 cup (60g) seeded black olives; 125 gram feta cheese, cut into cubes; 1 tablespoon extra virgin olive oil; 1/4 teaspoon dried oregano leaves; 250 gram tub prepared baba ghanoush; 2 tablespoon chopped fresh flat-leaf parsley; 2 teaspoon lemon juice