Preheat the oven to 200C / 180C Fan / Gas 6
Cut the prepared beetroot into large chunks and place on a square of foil large enough to enclose it all.
Season with salt & pepper then drizzle with 2 tsp of the olive oil.
Bring up the sides of the foil, scrunch together to make a parcel then place on a baking tray.
Put in the oven and bake until the beetroot is tender (30-40 min). Set aside.
Slice off the top centimetre of garlic and discard it.
Place the base on a square of foil large enough to enclose it.
Season with salt & pepper then drizzle with 1 tsp of the olive oil.
Bring up the sides of the foil, scrunch together to make a parcel then place it on the baking tray with the beetroot.
Put in the oven and bake until the garlic is tender (20-30 min). Set aside.
Put the drained chickpeas in the bowl of a food processor & briefly process to break them up.
Add to the processor the cooked beetroot (including any juices) and squeeze out the pulp from the cooked garlic cloves.
Add to the processor the tahini, the juice of one of the lemons, 1 tsp of the ground cumin, plus a little salt and a grind of pepper.
Process everything together, adding a little of the chickpea cooking liquor, vegetable stock or water to help bring the hummus together.
Taste and add more seasoning, lemon or cumin if liked. Add more liquid to thin it.
Serve chilled or at room temperature with salad, crudites, flatbread etc, with or without the optional toppings.
Should keep for 4 days if covered in the fridge (without the toppings).
If using dried chickpeas, you'll need to soak approximately 100-120 grams overnight and then cook until tender (around 1 - 1.5 hours on the stove or 30 minutes in a pressure cooker).