For the roast pumpkin - preheat the oven to 200°C (390°F) or 180°C (360°F) for fan-forced ovens. In a large bowl, place in the chopped pumpkin with salt, olive and sesame oil, toss to coat. Line a baking tray with baking paper (parchment paper) and layout the pumpkin. Roast the pumpkin for 30 minutes or until they are very soft. Don't worry if it's a little charred as it adds flavour and won't affect the overall colour of the hummus.
For the hummus - Whilst the pumpkin is roasting, cook the chickpeas. In a small saucepan, add in the chickpeas and chopped garlic. Pour enough water to submerge the chickpeas by at least 1 inch. Bring the chickpeas to a boil over high heat, reduce heat to low and let it simmer for 5 minutes. Reserve 1/3 cup of water from the chickpeas then drain the remaining water. Set the chickpeas and garlic aside.
In a food processor, place in the roast pumpkin, chickpeas, garlic, tahini, lemon, cumin, reserved water and blitz until smooth. Whilst the motor is still running, pour in the olive oil in a slow, steady stream. Have a taste of the Pumpkin Hummus and add salt or pepper if needed. Transfer the hummus into a bowl and leave it to cool at room temperature. Transfer the hummus into a sealed container and place it in the fridge for 1 to 2 hours to allow the hummus to thicken.
For the Za'atar - Place the sesame seeds, thyme and sumac into a small bowl and mix to combine.
For the prawns - Once the hummus has finished chilling, stir-fry the prawns. To mince the prawns, place them into a food processor and pulse a few times. Heat oil in a small frying pan over medium to high heat. Place in the garlic and chilli and stir-fry quickly for 30 seconds or until fragrant. Add in the prawns, stirring, and breaking them up at the same time. Stir-fry until the prawns are opaque or just cooked.
To Plate up - Place the Pumpkin Hummus into a bowl, use a spoon to create swirls on top. Pour on some extra virgin olive oil on top. Sprinkle the za'atar on top and add on the prawns. Optional garnish - Top with corn chips, chickpeas and micro herbs. Serve the Pumpkin hummus with corn chips or flatbread.