Drain the beans and save some water to use later. Reserve a handful of the whole beans for garnish. Transfer the rest to a large bowl. Blend the beans with hand blender until a smooth paste, adding ½ cup of olive oil gradually. Add the saved water if needed to help it blend. Add the tahini and blend in along with the lemon juice. Blend in the garlic, cumin and salt.
Spread the hummus into a flat serving dish and garnish with the saved beans and paprika and a drizzle of olive oil. Serve with pita bread.