Remove the small leaves at the base and cut off the stem. Set up a pot with water, salt and lemon. Cover the pot and cook the artichokes upside down until a fork easily pierces through the artichoke heart, about 40’. Allow to cool upside down.
While the artichokes cool, make the vinaigrette with dijon mustard, vinegar, olive oil, salt and pepper. Add artichokes to a platter with the vinaigrette. Dip the artichoke leaves, stem and heart into the vinaigrette and enjoy!