Hoisin, which is a blend of soybeans, garlic, chiles, and spices, makes a sweet-and-tangy glaze for roasted Cornish game hens.
Preheat oven to 375 degrees. Place hens in a roasting pan. Mix together garlic, ginger, and chiles in a small bowl. Rub garlic mixture over hens and under skin; stuff cavities with cilantro sprigs. Tie legs of each hen together with kitchen twine. Cover; refrigerate 20 minutes.
Remove hens from refrigerator, and brush with 1/2 cup hoisin. Roast 35 to 40 minutes, basting occasionally with extra hoisin. Remove from oven, and serve hot.
Hoisin is available in the Asian section of most supermarkets.