Wash the dried chickpeas under running cold water till water runs clear. Or you can rinse them 3-4 times or till the water is no more cloudy.
Soak them in enough water for 8 hours or overnight.
After the soaking time, discard the water. Take soaked chickpeas in a pressure cooker. Add 1 ½ cups of water and baking soda. Cover with the lid.
Pressure cook them for 2 whistles on HIGH and then 15 minutes on LOW heat. Let the pressure go down by itself then open the lid. Drain the cooking water.
Take chickpeas in a grinder jar or food processor.
Add garlic, tahini and yogurt. Squeeze the lemon juice.
Grind into smooth paste. As needed you can add water. I have used around 4 tablespoons of water to get the smooth paste. Do not add too much water that it gets runny. We are looking for thick paste.