How do you cook cornish hens in a oven bag?

To cook Cornish hens in an oven bag, preheat your oven to 375°F (190°C). Season the hens with your preferred spices and place them in the oven bag, adding any vegetables if desired. Seal the bag according to the package instructions, making a few slits for steam to escape, and place it in a roasting pan. Bake for about 1 to 1.5 hours, or until the internal temperature reaches 165°F (74°C).