Preheat oven to 375 degrees

Thaw, rinse and pat dry with paper two Cornish hens, rub the hens down with a tablespoon of extra virgin olive oil.

Season the Cornish hens with Old Bay seasoning, Cajun seasoning, onion powder, sea salt or Kosher salt, and freshly cracked black peppercorns. 

Stuff each Cornish hen with a mixture of chopped onions and minced garlic.

Add two tablespoons of EVOO to a 10-inch cast-iron skillet, scattered into the skillet 1 cup chopped onions. 

Place the Cornish on top of the onions and tuck several sprigs of fresh rosemary under the wings and around the Cornish hens.

Place the skillet on the center rack of a 375 degree preheated oven — Cook for 1-hour.