Heat oil until hot. Test by putting one drop of your batter inside, if it fries immediately then it is ready.
Mix flour, water, and egg in a bowl until smooth with a whisk.
Wash and cut off ends of green beans. Lay on paper towels and roll up to dry outsides off so batter will stick.
Use a fork and dip green beans into batter and put in oil when hot, turn over when lightly browned. Put on paper towels to absorb excess oil when done. Put a pinch of seasoned salt on and serve!