Article in English: Add enough water to cover the bottom 1/2 inch (1.25 cm) of the dish. Squeeze the lemon halves into the water and sprinkle with salt. Give the mix a quick stir to combine. The lemon juice and salt will help flavor the artichokes. In addition, the extra lemon juice will ward away oxidation. Dip the stem side of the artichokes in the water first. Then, flip them around so that the top petal side faces down into the water.  By dunking both ends of the artichoke into the water, you can coat more of the vegetable in the lemon and salt water. Placing the artichokes upside-down as you steam them in the microwave will prevent the leaves from collecting water as you cook them. Tightly cover the dish with microwave-safe plastic wrap, creating a good seal capable of trapping the steam inside the dish.  If you are using a dish with a tight fitting lid, use the lid instead of the plastic wrap. For added precaution, you can use both the plastic wrap and the lid, especially if the lid is fairly loose. You need to create a tight seal along the top of the dish to trap enough steam to cook the artichokes. Check the artichokes after the first 9 or 10 minutes and cook for an additional minute or so as needed. The artichokes are done once you can pierce the artichoke hearts with the tip of a paring knife and easily pull the inner leaves out with your fingers or a pair of tongs.

Summary in Vietnamese:
Pha nước, nước cốt chanh và muối vào đĩa dùng trong lò vi sóng. Đặt hoa Atisô vào đĩa. Bọc bằng màng bọc thực phẩm. Hấp trong lò vi sóng khoảng 10-13 phút.