I use two different kinds of tortillas when I make these tacos. Most of the time I use corn tortillas but I also love these tacos using fresh flour tortillas. For the corn tortillas, I heat a griddle over medium high heat then I make a mixture of a few tablespoons extra virgin olive oil and a few tablespoons vegetable oil, then I baste the oil mixture on the tortilla and cook each side until golden on each side. Then move tortilla to a plate lined with a paper towels to soak up extra oil.