Drain green beans and place in bottom of crockpot. Chop onion in big chunks and spread out over green beans. My family doesn't eat the onion so I make them big enough to take out at the end. Salt and pepper.
Place the ham on the green beans and onions. Add enough water to have about an inch of it in the bottom. I add a half of a cup to my 4qt oval crockpot.
Cook on high for 4 hours. Good served with potatoes and corn bread. Enjoy!!