01 - Preheat oven to 375°F. Line a 12-cup muffin tin with paper liners or lightly grease each cavity.
02 - In a large mixing bowl, whisk together the flour, baking powder, baking soda, salt, and curry powder until evenly distributed.
03 - In a separate bowl, beat eggs, milk, yogurt, vegetable oil, and soy sauce until smooth and homogenous.
04 - Pour the wet ingredients into the dry mixture and fold gently with a spatula just until incorporated. Do not overmix to ensure tender muffins.
05 - Gently fold in the cooked potatoes, grated carrot, green onion, and both cheeses, reserving 1/4 cup mozzarella for topping.
06 - Divide the batter evenly among the prepared muffin cups. Sprinkle reserved mozzarella cheese on top of each.
07 - Place the muffin tin in the oven and bake for 22 to 25 minutes until the tops are golden and a toothpick inserted in the center comes out clean.
08 - Allow muffins to cool in the tin for 5 minutes before transferring to a wire rack. Serve warm or at room temperature.