600g(1⅓lb)potatoespeeled and sliced to 5mm (¼in) thick
50g(⅓cup)gruyere cheesegrated
25g(¼cup)parmesan cheesegrated
Instructions
Add 1 tbsp olive oil to a small saucepan and set over medium-high heat. Once shimmering, add the shallots and garlic and cook until fragrant - about 2 minutes. Add in the thyme, miso paste and nutmeg and cook for another 30 seconds.
Pour over the evaporated milk and salt and bring to a gentle simmer. Remove the pan from the heat and let infuse - off heat - for one hour.
Preheat oven to 190°C/375°F. Strain the milk mixture into a large mixing bowl, discarding the solids. Add the sliced potatoes and ensure they are evenly coated.
Lightly grease a 9-inch (23cm) pie dish or 8-inch (20cm) square baking dish. Shingle a single layer of potatoes on the bottom of the dish, overlapping them slightly. Sprinkle with 1/3 of the gruyere and parmesan and season with pepper. Repeat with two more layers of potatoes and cheese. Pour the remaining evaporated milk over the potatoes.
Cover the dish with foil and bake for 30 minutes - or until the potatoes are bubbling and the cheese is melted. Remove the foil and bake until the top of the potatoes are golden brown and beginning to crisp - another 10-15 minutes. Remove from the oven and allow to cool for 5-10 minutes before serving.
Notes
Use the weight measurement of salt over the volumetric if at all possible. The volume of different styles and brands of salt can vary drastically so going by weight will give you the most consistent results.