But I tried that one recently and it left a bit to be desired. The problem may have been that the cup I used, you put the tortilla in a coffee cup and then put it a microwave to harden, was too small for the tortilla.
You can see the result here, the tortilla curved on one side, the side in the cup, but remained largely open on the other. A second attempt in which I tried to push it deeper into the cup caused it to split in the middle.
Why not just buy taco shells? Because all I’ve seen are extremely high in salt but I have managed to find low-salt tortilla shells.
I’ll try this hack again with a deeper cup and see if that helps. It was fun to have a hard shell again, especially one that was low in salt, in which to put my low-fat ground turkey mixture.