A traditional Indian dal made with chana dal (split chickpeas) or split yellow peas.
Substitute water for the chicken stock to make this completely vegetarian. 
In the pressure cooker pot, without the lid, melt the butter over medium heat. Add the onion, garlic, ginger and celery and saute until softened, about 5 minutes. Stir frequently so the vegetables don't brown.
Add the beans to the pressure cooker along with the waterk. Fasten the lid on the pressure cooker and cook on medium-high heat for 10 minutes. Start the timer after the pressure relief valve begins to whistle.
Turn the heat off and allow the cooker to cool sufficiently to remove the lid.