flour tortillas
cooking spray
1. Take a couple of oven proof bowls. Turn one upside down on a baking sheet and lightly spray it with cooking spray. Place the tortilla over the bowl and then put another bowl over the tortilla shell to form the bowl (photo of this in the comments below).
2. Bake in a 350-degree oven for 8 minutes. Remove the outer bowl and return to the oven for 3-4 minutes. Remove from the oven and let cool for 5 minutes before removing the tortilla bowl from the dish. Fill with your favorite taco salad fillings.