1    Egg
1 ts Salt
1/2 ts Prepared mustard
1/2 tb Sugar
1    -(up to)
1 1/4 c  Salad oil
2 tb Lemon juice or vinegar
1 tb Hot water

Beat egg well. Add seasonings; then beat well. Add 1/4 cup oil; beat until
thick. Add the rest a little at a time. Last of all add the water. It can
also be made using only the yolk.