1 In a blender or food processor, combine the chopped oranges, onion, chipotle in adobo, garlic, cilantro, rosemary, thyme, marjoram, and salt. Pulse a few times to make a coarse purée.
2 Put boneless chicken thighs between two sheets of wax paper and pound with a meat hammer until an even thickness of about 1/2-inch. Combine the chicken pieces and the orange marinade together either in a bowl or in a ziplock freezer bag. Refrigerate overnight.
3 Heat olive oil in a large cast iron pan on medium high heat. Remove chicken pieces from the marinade, wiping off excess (but not all) marinade. Working in batches, cook the chicken pieces for 5 minutes on each side.
Serve over rice orSpanish rice.