Heat oven to 450 degrees F. Pierce potatoes with fork; place on microwave-safe paper towel or roasting rack in microwave. Microwave on high for 6 to 8 minutes or until almost tender, turning once halfway through cooking.

 

Meanwhile, in resealable food storage plastic bag, combine taco seasoning mix and cornmeal; mix well. Cut cooked potatoes lengthwise into quarters; place in large shallow dish. Drizzle with oil and toss to coat. 

 

With large slotted spoon, place potatoes in plastic bag with seasoning mixture; shake to coat. Arrange potatoes on ungreased cookie sheet. Bake at 450 degrees F for 8 minutes or until golden brown and tender.