Remove the innards from the cavity of the hen and discard (or freeze for later.) Pat the hens fry with a paper towel and place on a baking sheet.
Coat the hens, liberally, with the olive oil. Season the inside and outside with salt and pepper.
Stuff half the lemon, garlic and herbs into the cavity of the hens. Tie the legs together with kitchen twine and tuck the wing tips under the back of the hen. (This prevents the tips from burning.)
Roast the cornish hens for 40 minutes until the skin is golden crispy and the juices run clear. Your cornish hen is done when the temperature reaches 165˚F on an instant read thermometer.
Remove your cornish hens from the oven and cover with foil. Allow the hens to rest for 10 minutes prior to serving.
Notes
You can prep the cornish hens up to 24 hours in advance. Cover and store in the refrigerator until ready to bake. Remove from the refrigerator 30 minutes prior to baking.