For the Caramelized Onions:

1 tablespoon extra virgin olive oil
3 medium yellow onions
Salt and black pepper
For the Chipotle Mayonnaise:

1/2 cup mayonnaise
1 tablespoon finely chopped chives
1 chipotle in adobo sauce
1 1/2 teaspoon adobo sauce
1 teaspoon lemon juice
Salt and freshly ground black pepper
For the Panini:

1 pound New York strip steak
Kosher salt and pepper
1 tablespoon extra virgin olive oil
Chipotle Mayonnaise
1 ciabatta loaf or baguette, cut into 4 sections
8 slices Monterey Jack cheese
Caramelized Onions
1 7-oz can whole roasted green chiles, chopped