1. Rub olive oil in a heavy skillet.
2. Saute steak over high heat until medium rare to medium, turning once (7 to 10 minutes).
3. Set aside until cool; slice thinly.
4. Stir together chipotle in adobo and mayonnaise; spread on tortillas.
5. Add 2 tbs.fresh cilantro to each; top with beef and lettuce and tomato. Roll up.