Indian Spiced Chicken Burgers

For the Indian chicken burgers

• 1 pound 10 oz ground chicken thighs
• 1 tablespoon full-fat Greek-style yogurt
• 1 tablespoon ginger paste
• 1 teaspoon garlic paste
• 1 teaspoon chile powder
• 1 teaspoon ground coriander
• 1 teaspoon garam masala
• 1/2 teaspoon freshly ground black pepper
• 1 teaspoon table salt
• 3 green chiles such as jalapeno, finely chopped
• 1 medium onion finely chopped
• 2 small tomatoes chopped
• 2 tablespoons chopped fresh cilantro leaves
• 1 large egg beaten
• 1/2 cup Mild vegetable oil for frying, plus more for your hands

To serve

• 12 small burger buns naan, or pita bread
• Chutney (optional)
• 1 red onion sliced into 12 rings