Rinse and sort beans. Transfer to a 6-qt. electric pressure cooker. Add ham hocks. Stir in broth, water, onion and seasonings. Lock lid; close pressure-release valve. Adjust to pressure-cook on high for 30 minutes. Let pressure release naturally for 10 minutes; quick-release any remaining pressure. , When cool enough to handle, remove meat from bones; cut ham into small pieces and return to pressure cooker. Serve with a slotted spoon. Sprinkle with green onions if desired.