Ingredients
Method
- Preheat your oven to 350°F (175°C) and grease your baking dish with butter.
- Slice the potatoes and onions into rounds approximately 1/8-inch thick.
- Melt the butter in a saucepan over medium heat and whisk in the flour, cooking for 1-2 minutes.
- Slowly pour in the milk and heavy cream while whisking, adding garlic, thyme, salt, and pepper; cook until thickened.
- Layer half of the potato and onion slices in the dish, pour in half of the sauce, and repeat the layers.
- Cover with foil and bake for 45 minutes, then remove foil and bake for another 30-40 minutes until golden brown.
- Allow to rest for 10-15 minutes before serving.
Notes
Ensure potato slices are not rinsed to retain starches. Use room temperature milk to prevent clumping.
