Mexican Steak Torta

Preheat an outdoor grill for medium-high heat, and lightly oil the grate. Season steak with garlic salt, black pepper, cumin, and cayenne pepper.

Grill steak on the preheated grill until medium-rare, about 5 minutes per side. Remove from heat to a cutting board and cover with foil.

Set a large skillet over medium-high heat. Spread both halves of each roll with mayonnaise. Brown the rolls, mayonnaise-side down until golden, about 3 minutes. Warm the refried bean in a bowl in the microwave, about 1 minute on High, and slice the sirloin steak into thin strips.

Spread a thin layer of beans on the bottom half of each roll, layer with steak, avocado, tomato, and lettuce. Top with cheese, if desired, and close the sandwich with the top of the roll.