Pumpkin fatteh

Name: Pumpkin fatteh
Prep time: 25 min
Cook time: 50 min
Total time: 1 h 15 min
Cuisine: Middle Eastern
Ingredients: 1 kg Jap pumpkin, cut into thin wedges; 50 ml olive oil; 200 gm dried chickpeas, soaked overnight in cold water, drained; 50 gm pine nuts; 1 piece Lebanese flatbread; 200 gm Greek-style yoghurt; Juice of 1 lemon; ½ cup (loosely packed) each flat-leaf parsley and mint; 1 tbsp black sesame seeds; 100 ml extra-virgin olive oil; 50 ml grapeseed oil; 25 ml lemon juice; 25 ml white wine vinegar; Pinch of caster sugar