2. Set the tostada shells on plates and spoon the sour cream on top. Cover with the iceberg lettuce and sliced steak. Spoon the radish salad over the steak and sprinkle with the cilantro leaves.

(This salad can handle a heavy coat.) Remove steak from marinade and season on both sides with salt. Heat grill (or grill pan) to medium-high. Grill until char marks appear, about 4-5 minutes per ...