I made this one up out of the blue, and it turned out to be really tasty.
Put the following ingredients through a food processor:
3 garlic cloves
1/2 an onion
3 chipotle adobo peppers
1/2 cup soy sauce
Juice of 2 limes
1 tsp oregano
1 tsp cumin
Butterfly and marinate 2 1/2 lbs. chicken breast in this mixture for about an hour.
Grill the chicken on medium heat.
Serve sliced, on tortillas, with my salsa slaw (3 cups shredded cabbage, 1/2 cup chopped cilantro, 1 cup salsa, 2 tbsps sour cream).