At Frontera Grill in Chicago Chef Rick Bayless serves this classic dish that combines grilled marinated steak, fried plantains, homemade black beans & fresh guacamole. The easy way - trim back the ingredients in the marinade and use canned black beans served with avocado slices. Food & Wine Magazine, July 2008 edition. The ancho-chile marinade can be made up to a week ahead. The cooked black beans can be refrigerated up to 2 days ahead or on the spur of the moment - open up cans of cooked black beans & rinse them real well! The marinade needs to season the rib-eye steaks overnight. When we made it we served the guacamole; a dollops of sour cream and fried ripe plantains. Delicioso :)