In a large glass container, add chicken, lime juice, garlic, 2 tablespoon olive oil, cumin, oregano, salt, and pepper.
Cover and refrigerator at least one hour, or overnight.
Heat 2 tablespoon olive oil in a large skillet.
Cook chicken until no longer pink in the center. About 4-5 minutes, each side.
Remove from heat and let cool.
Meanwhile, slice bread in half.
Toast the bread on a hot griddle.
Add mayonnaise to the top half.
Add chicken, avocado, pickled jalapeños, tomato, onions, red onions to the bottom half.
Place the top half to the bottom half.
Enjoy!