Add the garlic to the Thermomix bowl and chop for 5 sec/speed 7. Scrape down the sides of the mixing bowl with a spatula.
Add the chickpeas, tahini, olive oil, lemon juice and cumin. Blend for 1 min/speed 4. Scrape down the sides of the bowl, then blend again for 1-3 min/speed 4. If the hummus is too thick, add a little ice-cold water through the hole in the lid while the blades are running until you reach your desired consistency.
Season with salt and pepper, and add extra lemon juice to taste.
Consistency note: Even when fully blended, the hummus may have a very slight, fine grain. It won’t be completely silky-smooth, and that’s perfectly normal.
To serve, drizzle with olive oil and sprinkle with sumac or paprika.
Notes
Storage: Store the hummus in an airtight container in the fridge for up to a week or freeze for up to three months.