In a small bowl, blend together the cilantro, lime juice and zest, and mayonnaise to create the cilantro lime mayo.
½ cup mayonnaise, ¼ cup cilantro leaves, 1 tablespoon lime juice
Get a frying pan on the stove top over medium heat. Slice the bread rolls in half and smear mayonnaise over the cut side of each half. Once the pan is preheated, toast the bread cut side down in the pan until golden brown, about 2-4 minutes. Remove the toasted rolls and set aside.
4 bolillo rolls, ¼ cup mayonnaise
Slice the carne asada against the grain once rested.
On the bottom half of the toasted rolls, give a generous smear of warm refried beans. Put a layer of sliced steak, then lettuce, tomatoes, pickled onion, your avocado, and crumble on some cotija cheese. Repeat for each roll, and remember: these are meant to be huge sandwiches!
1 cup refried beans, head of lettuce, 3 ripe tomatoes, pickled onions, 3 hass avocados, 1 cotija cheese
Smear the cilantro lime mayo onto the top halves of the rolls and top the sandwiches. Wrap with parchment paper or stick in toothpicks for stability. Serve immediately.