Tandoori Marinated Cornish Hens on the Rotisserie

Name: Tandoori Marinated Cornish Hens on the Rotisserie
Ingredients: 1 medium yellow onion, coarsely chopped; 6 cloves garlic, coarsely chopped; 1-inch fresh ginger, peeled and coarsely chopped; 1 teaspoon saffron threads; 1/4 cup fresh lime juice; 16 ounces plain yogurt, drained through a strainer lined with cheesecloth for 2 hours; 2 teaspoons kosher salt; 1 teaspoon coriander; 1 teaspoon ground cumin; 2 teaspoons cayenne; 1 teaspoon turmeric; 1/2 teaspoon ground white pepper; 4 cornish hens; Thinly sliced white onion; Fresh cilantro sprigs; Lime wedges