Pierce potatoes with a fork. Arranged in spoke pattern on microwave safe paper towel in microwave. Microwave on high for 12 to 14 minutes or until tender, turning potatoes and rearranging halfway through cooking. Cool 3 minutes.

Meanwhile, heat taco sauce with seasoned ground beef as directed on container.

To serve, place potatoes on individual serving plates. Cut potatoes in half lengthwise; mah slightly with fork. Spoon about 1/2 cup ground beef mixture over each potato. Top with cheese, tomato and onions.