Cut Round Roast, or whatever boneless low fat beef cut you have purchased, into about 2-3 inch square-like cuts.
Soak the beef in warm water for 1 hour.
Close to the end of the hour, chop up the onions into little chunks and toss into the blender. Add the oil, garlic, ginger paste, and salt in as well. Blend together and set mixture aside.
Drain the water from the beef and rinse off until clean. Then place the beef into the pressure cooker and pour the onion mixture over it.