Trim the artichoke: Cut the stem flush at the bottom of the artichoke so that it will sit flat on the plate when serving. Slice about 1/2 inch of the leaves off the top. Break off the small tough outer leaves near the stem. Rinse thoughly.
Bring a large pot of salted water to a boil, add the artichokes, cover, reduce heat and boil until the stem end is just tender. This can take anywhere between 30-60 minutes, depending on how fresh the artichoke is.
Drain the artichoke upside down in a colander.
While the artichokes are cooling make the vinaigrette for dipping
Place the artichoke (stem down) on a serving plate, separated the leaves a bit. You can either drizzle with the vinaigrette or use the vinaigrette on the side to dip each leaf in before eating.