Tandoori Pork on the Outdoor Grill

Name: Tandoori Pork on the Outdoor Grill
Ingredients: 14-ounce pork loin or tenderloin; naan bread, to serve; plain yogurt, to serve; 1 small cucumber, julienned; 2 x 4-inch pieces of fresh ginger, peeled and finely chopped; 12 garlic cloves, finely chopped; 1 tablespoon ground cumin; 1 tablespoon ground coriander; 1 tablespoon sweet paprika; 2 1/2 teaspoons garam masala; 1 teaspoon ground fenugreek; 2 teaspoons Indian chile paste (see note); 5 tablespoons lemon juice; 1/4 cup mustard oil (see note)