Soak the chickpeas overnight in a bowl with 5 cups of water and the baking soda.
The next day, rinse the chickpeas with fresh water, drain them and then add them into the pressure cooker. Add 6 cups of water.
Bring the pressure cooker up to full pressure on the low setting. Lower the heat and keep it at pressure for 6 min.
Cool down the pressure cooker by putting it under cold water, open the lid (carefully). Strain the chickpeas, reserve some of the liquid.Let the chickpeas cool, when the chickpeas are lukewarm then proceed.
Prepare Hummus:
Add the garlic & salt to the food processor. Blend.
Add the chickpeas, and blend for a few minutes until smooth.
Add the tahini & lemon juice. Blend again, and done!
Notes
If the hummus is too thick, add some of the reserved chickpea liquid and blend.Hummus may thicken when refrigerated, simply add a little water & mix to achieve desired consistency.