Cook green beans as you normally would in a saucepan of boiling water. (usually take about 5 minutes). Drain beans in colander. When drained put beans in a bowl (with a little extra room for mixing).
In a small bowl (seperate from the one the green beans are in) wisk all ingredients except for the olive oil. When all are mixed well pour olive oil in the bowl wisking continuously until the oil is well blended into the mixture.
When the sauce is done pour over the beans, then "toss" the beans (salad tongs work the best). Being sure to evenly coat the beans.