Carne Asada Sandwiches With Chipotle Mayonnaise

• red onion, thinly sliced↗1
• red wine vinegar↗1⁄4 cup
• garlic↗3 cloves
• salt↗2 teaspoons
• lime juice↗2 tablespoons
• olive oil↗2 tablespoons
• round steaks (1/4 - 1/3 inch thick, can use flank or skirt steak as well)↗2 lbs
• regular mayonnaise or 1/2 cup light mayonnaise (I use Hellman's light mayo)↗1⁄2 cup
• pureed canned chipotle chile in adobo (you can usually find this in the ethnic aisle of a larger grocery store)1 tablespoon
• 6 focaccia bread or 6 other buns↗6
• avocados, halved,pitted,peeled,thinly sliced↗2

Step-by-step instructions

1. 1

   Rinse the onion slices in a strainer under cold running water.

2. 2

   Pat dry; place in a bowl.

3. 3

   Cover with the red wine vinegar.

4. 4

   Set aside for 30 minutes or up to 2 hours.

5. 5

   Pound the garlic with salt, using a mortar and pestle, to make a paste.

6. 6

   Add 1 tablespoon of the lime juice and incorporate it into the garlic.

7. 7

   Slowly add the olive oil, stirring with the pestle to incorporate it.

8. 8

   (If you don't have a mortar and pestle, this can be done in a food processor.) Spoon the garlic mixture over the steak, spreading it with the back of a spoon.

9. 9

   Season with salt.

10. 10

    Turn the meat over and do the same with the other side.

11. 11

    Combine the mayonnaise, pureed chipotle and sauce and remaining 1 tablespoon of the lime juice in another small bowl.

12. 12

    Grill or fry the beef over high heat, 3 minutes.

13. 13

    Turn; cook to medium rare, 1-2 minutes.

14. 14

    Set aside.

15. 15

    Cut the rolls in half; spread each half with 1 tablespoon of the chipotle mayonnaise.

16. 16

    Arrange the avocado slices on the top half of the roll; top with a few onion rings.

17. 17

    Cut the meat into pieces roughly the size of the bread; arrange on the onion rings.

18. 18

    Add the bottom half of the roll; press gently to compact everything together.