Grilled Cornish Hens

Name: Grilled Cornish Hens
Ingredients: Nonstick cooking spray; 3 small Cornish hens, about 2 pounds each, thawed if frozen, split, backbone removed with kitchen shears; ¼ cup orange juice; ¼ cup balsamic vinegar; ¼ cup olive oil; 1 tablespoon minced garlic; 1 tablespoon minced fresh rosemary; 1 tablespoon minced shallot; 1 tablespoon finely grated orange zest; 1 tablespoon low-sodium soy sauce; Salt; ¼ teaspoon dried red pepper flakes; Freshly ground pepper; ⅔ cup orange marmalade mixed with 2 tablespoons low-sodium soy sauce, for glaze