Preheat the oven to 180℃.
Brush the muffin tray with some oil.
Cut the tortilla into small circles using a round cookie cutter, a lid or can. The diameter of the circles should be about 3½ inches.
Alternately, use the can to cut around it using a knife.
Push a circle of the tortilla into the oiled muffin cup. Press the sides against the wall of the cup.
Repeat with the remaining circles. I made 12 cups.
Brush the top of the tortilla cups with some oil.
Bake in the oven for 15-20 minutes.
I also put the scraps of tortilla to bake.Brush them lightly with oil before baking.
Keep an eye as in some ovens the tortilla may crisp up within 15 minutes. They tend to turn brown very quickly.
Remove the baked tortilla cups from the oven.
Place them on a wire rack to cool.
In the meantime prepare the salad and the salad dressing.