Grilled Tandoori Chicken

Name: Grilled Tandoori Chicken
Ingredients: 1 (4 to 4 1/2 pound) chicken, cut into 8 pieces, skin removed; 2 tablespoons vegetable oil; 1/2 cup chopped white onion; 2 tablespoons chopped garlic; 2 tablespoons chopped ginger; 1 teaspoon finely chopped serrano or jalapeno pepper, stem and seeds removed; 1 tablespoon paprika; 11/2 teaspoons salt; 1 teaspoon ground cumin; 1 teaspoon turmeric; 1 teaspoon ground coriander; 1 teaspoon garam masala; 1/2 teaspoon cayenne; 1/2 cup plain yogurt; 1 tablespoon fresh lemon juice