1Heat oven to 450°F. Pierce potatoes with fork; place on microwavable paper towel or roasting rack in microwave. Microwave on High 6 to 8 minutes, turning once halfway through cooking, until almost tender.
2Meanwhile, in large resealable food-storage plastic bag, mix taco seasoning mix and cornmeal.
3Cut cooked potatoes lengthwise into quarters; place in large shallow dish. Drizzle with oil; toss to coat. With large slotted spoon, place potatoes in plastic bag of seasoning mixture; shake to coat. Arrange potatoes on ungreased cookie sheet.
4Bake about 8 minutes or until golden brown and tender. Serve with salsa.