Strain the black beans to remove water from the can.
Place the beans, garlic, cumin and lemon juice in a blender.
Mix gently. The hummus will be thick and may prevent the ingredients from blending initially. Start and stop, open the blender and move ingredients around with a spoon, then pulse for a few more seconds, move again with spoon and pulse again.
Extract the oil-free hummus from the blender, place it in a medium size bowl and top it with cilantro or your fresh herb of choice, as well as some finely chopped red onion.