Spray a small saucepan with nonstick spray coating. For sauce, cook onion and garlic in the saucepan until onion is tender.
In a small bowl, stir together chicken broth, orange zest, orange juice, honey and cornstarch. Stir into onion mixture in saucepan. Cook and stir until thickened and bubbly. Cook and stir for 2 minutes more, then remove from the heat.
Rinse hen halves and pat dry. In a shallow roasting pan place each hen half atop one orange wedge. Baste with some of the sauce.
Roast hens for 45 minutes to 1 hour or until tender and no longer pink. Baste hen halves with sauce after 30 minutes.
Transfer hen halves to a serving platter. If necessary, reheat remaining sauce and serve with hen halves. If desired, garnish with orange slices.
Notes
Use kitchen shears to cut hens in half. A good bread knife will also cut through the hens (but may dull the blade).
If you are preparing this recipe as gluten-free, just be sure to use a brand of chicken broth that is known to be GF.