This is found mainly in Arizona.

Flour tortilla
1/2 Monterey jack cheese and
  1/2 Cheddar cheese, grated
Jalape? chiles, sliced

Preheat oven to 375 degrees F.

Place tortilla in the oven and bake just until it starts to become crisp and a little brown, 2 1/2 to 3 1/2 minutes. Remove the tortilla, sprinkle on the grated cheese, and top with the chiles. Replace the tortilla in the oven and continue to cook it until the cheese is melted and bubbling.

Mexican Pizza

Preheat oven to 375 degrees F.

Place tortilla in the oven and bake just until it starts to become crisp and a little brown, 2 1/2 to 3 1/2 minutes. Remove tortilla, sprinkle on grated cheese, then any of the following toppings you desire. Replace the tortilla in the oven and continue to cook it until the cheese is melted and bubbling.

Any taco filling
Avocado, chopped
Bacon, cooked and crumbled
Black olives, sliced
Chorizo, cooked and drained
Scallions, minced
Salsa picant?br>Sour cream
Tomato, peeled, seeded and chopped